1265213316 has 24 divisors (see below), whose sum is σ = 2958840864. Its totient is φ = 420784000.

The previous prime is 1265213309. The next prime is 1265213317. The reversal of 1265213316 is 6133125621.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1265213317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113685 + ... + 124316.

It is an arithmetic number, because the mean of its divisors is an integer number (123285036).

Almost surely, 2^1265213316 is an apocalyptic number.

It is an amenable number.

1265213316 is an abundant number, since it is smaller than the sum of its proper divisors (1693627548).

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

1265213316 is a wasteful number, since it uses less digits than its factorization.

1265213316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238451 (or 238449 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 1265213316 is about 35569.8371657785. The cubic root of 1265213316 is about 1081.5698808491.

Adding to 1265213316 its reverse (6133125621), we get a palindrome (7398338937).

The spelling of 1265213316 in words is "one billion, two hundred sixty-five million, two hundred thirteen thousand, three hundred sixteen".