1265256432 has 60 divisors (see below), whose sum is σ = 3862871064. Its totient is φ = 383410560.

The previous prime is 1265256409. The next prime is 1265256481. The reversal of 1265256432 is 2346525621.

1265256432 is a `hidden beast` number, since 1 + 2 + 6 + 5 + 2 + 5 + 643 + 2 = 666.

1265256432 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

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, 397803 + ... + 400970.

Almost surely, 2^1265256432 is an apocalyptic number.

1265256432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1265256432 is an abundant number, since it is smaller than the sum of its proper divisors (2597614632).

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

1265256432 is a wasteful number, since it uses less digits than its factorization.

1265256432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798798 (or 798789 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 1265256432 is about 35570.4432359227. The cubic root of 1265256432 is about 1081.5821666396.

The spelling of 1265256432 in words is "one billion, two hundred sixty-five million, two hundred fifty-six thousand, four hundred thirty-two".