1265897472 has 104 divisors (see below), whose sum is σ = 3857764416. Its totient is φ = 361660416.

The previous prime is 1265897467. The next prime is 1265897561. The reversal of 1265897472 is 2747985621.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78658 + ... + 93374.

Almost surely, 2^1265897472 is an apocalyptic number.

1265897472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1265897472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928882208).

1265897472 is an abundant number, since it is smaller than the sum of its proper divisors (2591866944).

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

1265897472 is an equidigital number, since it uses as much as digits as its factorization.

1265897472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14751 (or 14729 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 51.

The square root of 1265897472 is about 35579.4529468906. The cubic root of 1265897472 is about 1081.7647963829.

The spelling of 1265897472 in words is "one billion, two hundred sixty-five million, eight hundred ninety-seven thousand, four hundred seventy-two".