1251025120 has 24 divisors (see below), whose sum is σ = 2955547224. Its totient is φ = 500409984.

The previous prime is 1251025117. The next prime is 1251025129. The reversal of 1251025120 is 215201521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251025129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3909294 + ... + 3909613.

It is an arithmetic number, because the mean of its divisors is an integer number (123147801).

Almost surely, 2^1251025120 is an apocalyptic number.

1251025120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251025120 is an abundant number, since it is smaller than the sum of its proper divisors (1704522104).

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

1251025120 is an equidigital number, since it uses as much as digits as its factorization.

1251025120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7818922 (or 7818914 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1251025120 is about 35369.8334743041. The cubic root of 1251025120 is about 1077.5117384322.

Adding to 1251025120 its reverse (215201521), we get a palindrome (1466226641).

The spelling of 1251025120 in words is "one billion, two hundred fifty-one million, twenty-five thousand, one hundred twenty".