1265604928 has 84 divisors (see below), whose sum is σ = 2931273792. Its totient is φ = 540583680.

The previous prime is 1265604889. The next prime is 1265604931. The reversal of 1265604928 is 8294065621.

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, 1388793 + ... + 1389703.

Almost surely, 2^1265604928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1265604928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1465636896).

1265604928 is an abundant number, since it is smaller than the sum of its proper divisors (1665668864).

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

1265604928 is an equidigital number, since it uses as much as digits as its factorization.

1265604928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 1265604928 is about 35575.3415724993. The cubic root of 1265604928 is about 1081.6814594123.

The spelling of 1265604928 in words is "one billion, two hundred sixty-five million, six hundred four thousand, nine hundred twenty-eight".