1252990720 has 72 divisors (see below), whose sum is σ = 3159329040. Its totient is φ = 474808320.

The previous prime is 1252990703. The next prime is 1252990759. The reversal of 1252990720 is 270992521.

It is a super-2 number, since 2×1252990720² = 3139971488812236800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1252990720.

It is a congruent 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, 1441 + ... + 50080.

It is an arithmetic number, because the mean of its divisors is an integer number (43879570).

Almost surely, 2^1252990720 is an apocalyptic number.

1252990720 is a gapful number since it is divisible by the number (10) 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 1252990720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1579664520).

1252990720 is an abundant number, since it is smaller than the sum of its proper divisors (1906338320).

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

1252990720 is an equidigital number, since it uses as much as digits as its factorization.

1252990720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51561 (or 51547 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 1252990720 is about 35397.6089587983. The cubic root of 1252990720 is about 1078.0757688869.

The spelling of 1252990720 in words is "one billion, two hundred fifty-two million, nine hundred ninety thousand, seven hundred twenty".