1265531796 has 96 divisors (see below), whose sum is σ = 3404213120. Its totient is φ = 406280448.

The previous prime is 1265531767. The next prime is 1265531807. The reversal of 1265531796 is 6971355621.

1265531796 is a `hidden beast` number, since 1 + 2 + 6 + 553 + 1 + 7 + 96 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 337146 + ... + 340878.

Almost surely, 2^1265531796 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 1265531796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1702106560).

1265531796 is an abundant number, since it is smaller than the sum of its proper divisors (2138681324).

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

1265531796 is a wasteful number, since it uses less digits than its factorization.

1265531796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3862 (or 3854 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 1265531796 is about 35574.3137108785. The cubic root of 1265531796 is about 1081.6606243026.

The spelling of 1265531796 in words is "one billion, two hundred sixty-five million, five hundred thirty-one thousand, seven hundred ninety-six".