1325665512 has 48 divisors (see below), whose sum is σ = 3595546500. Its totient is φ = 441248256.

The previous prime is 1325665507. The next prime is 1325665529. The reversal of 1325665512 is 2155665231.

1325665512 is a `hidden beast` number, since 1 + 32 + 56 + 65 + 512 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1133399556 + 192265956 = 33666^2 + 13866^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38064 + ... + 64032.

Almost surely, 2^1325665512 is an apocalyptic number.

1325665512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1325665512 is an abundant number, since it is smaller than the sum of its proper divisors (2269880988).

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

1325665512 is a wasteful number, since it uses less digits than its factorization.

1325665512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26690 (or 26683 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 1325665512 is about 36409.6898091703. The cubic root of 1325665512 is about 1098.5284764262.

The spelling of 1325665512 in words is "one billion, three hundred twenty-five million, six hundred sixty-five thousand, five hundred twelve".