1265297928 has 16 divisors (see below), whose sum is σ = 3163244880. Its totient is φ = 421765968.

The previous prime is 1265297911. The next prime is 1265297933. The reversal of 1265297928 is 8297925621.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26360350 + ... + 26360397.

It is an arithmetic number, because the mean of its divisors is an integer number (197702805).

Almost surely, 2^1265297928 is an apocalyptic number.

It is an amenable number.

1265297928 is an abundant number, since it is smaller than the sum of its proper divisors (1897946952).

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

1265297928 is a wasteful number, since it uses less digits than its factorization.

1265297928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52720756 (or 52720752 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The square root of 1265297928 is about 35571.0265244061. The cubic root of 1265297928 is about 1081.5939905518.

The spelling of 1265297928 in words is "one billion, two hundred sixty-five million, two hundred ninety-seven thousand, nine hundred twenty-eight".