1265315156 has 12 divisors (see below), whose sum is σ = 2530630368. Its totient is φ = 542277912.

The previous prime is 1265315143. The next prime is 1265315171. The reversal of 1265315156 is 6515135621.

1265315156 is an admirable number.

It is a congruent number.

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, 22594886 + ... + 22594941.

It is an arithmetic number, because the mean of its divisors is an integer number (210885864).

Almost surely, 2^1265315156 is an apocalyptic number.

It is an amenable number.

1265315156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1265315156 is a wasteful number, since it uses less digits than its factorization.

1265315156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45189838 (or 45189836 counting only the distinct ones).

The product of its digits is 27000, while the sum is 35.

The square root of 1265315156 is about 35571.2686869614. The cubic root of 1265315156 is about 1081.5988994396.

The spelling of 1265315156 in words is "one billion, two hundred sixty-five million, three hundred fifteen thousand, one hundred fifty-six".