1311450620 has 12 divisors (see below), whose sum is σ = 2754046344. Its totient is φ = 524580240.

The previous prime is 1311450619. The next prime is 1311450631. The reversal of 1311450620 is 260541131.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32786246 + ... + 32786285.

It is an arithmetic number, because the mean of its divisors is an integer number (229503862).

Almost surely, 2^1311450620 is an apocalyptic number.

1311450620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311450620 is an abundant number, since it is smaller than the sum of its proper divisors (1442595724).

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

1311450620 is a wasteful number, since it uses less digits than its factorization.

1311450620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65572540 (or 65572538 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1311450620 is about 36213.9561495289. The cubic root of 1311450620 is about 1094.5879116287.

Adding to 1311450620 its reverse (260541131), we get a palindrome (1571991751).

The spelling of 1311450620 in words is "one billion, three hundred eleven million, four hundred fifty thousand, six hundred twenty".