1320425505 has 48 divisors (see below), whose sum is σ = 2625592320. Its totient is φ = 601340544.

The previous prime is 1320425497. The next prime is 1320425543. The reversal of 1320425505 is 5055240231.

It is a happy number.

1320425505 is a `hidden beast` number, since 132 + 0 + 4 + 25 + 505 = 666.

It is not a de Polignac number, because 1320425505 - 2³ = 1320425497 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76944 + ... + 92526.

It is an arithmetic number, because the mean of its divisors is an integer number (54699840).

Almost surely, 2^1320425505 is an apocalyptic number.

1320425505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1320425505 is a deficient number, since it is larger than the sum of its proper divisors (1305166815).

1320425505 is a wasteful number, since it uses less digits than its factorization.

1320425505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15870 (or 15867 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 1320425505 is about 36337.6595971727. The cubic root of 1320425505 is about 1097.0791671475.

Adding to 1320425505 its reverse (5055240231), we get a palindrome (6375665736).

The spelling of 1320425505 in words is "one billion, three hundred twenty million, four hundred twenty-five thousand, five hundred five".