1251265372 has 48 divisors (see below), whose sum is σ = 2559211200. Its totient is φ = 535080000.

The previous prime is 1251265363. The next prime is 1251265417. The reversal of 1251265372 is 2735621521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 961122 + ... + 962422.

It is an arithmetic number, because the mean of its divisors is an integer number (53316900).

Almost surely, 2^1251265372 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 1251265372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1279605600).

1251265372 is an abundant number, since it is smaller than the sum of its proper divisors (1307945828).

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

1251265372 is a wasteful number, since it uses less digits than its factorization.

1251265372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027 (or 2011 counting only the distinct ones).

The product of its digits is 25200, while the sum is 34.

The square root of 1251265372 is about 35373.2295952744. The cubic root of 1251265372 is about 1077.5807106098.

Adding to 1251265372 its reverse (2735621521), we get a palindrome (3986886893).

The spelling of 1251265372 in words is "one billion, two hundred fifty-one million, two hundred sixty-five thousand, three hundred seventy-two".