1320717456 has 30 divisors (see below), whose sum is σ = 3696174950. Its totient is φ = 440239104.

The previous prime is 1320717413. The next prime is 1320717457. The reversal of 1320717456 is 6547170231.

It is a happy number.

1320717456 is a `hidden beast` number, since 132 + 0 + 71 + 7 + 456 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1302055056 + 18662400 = 36084^2 + 4320^2 .

It is a super-2 number, since 2×1320717456² = 3488589197166223872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1320717456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320717457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4585681 + ... + 4585968.

Almost surely, 2^1320717456 is an apocalyptic number.

1320717456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1320717456 is an abundant number, since it is smaller than the sum of its proper divisors (2375457494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1320717456 is a wasteful number, since it uses less digits than its factorization.

1320717456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9171663 (or 9171654 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 1320717456 is about 36341.6765711215. The cubic root of 1320717456 is about 1097.1600172865.

Adding to 1320717456 its reverse (6547170231), we get a palindrome (7867887687).

It can be divided in two parts, 13207174 and 56, that added together give a triangular number (13207230 = T₅₁₃₉).

The spelling of 1320717456 in words is "one billion, three hundred twenty million, seven hundred seventeen thousand, four hundred fifty-six".