1252631490 has 32 divisors (see below), whose sum is σ = 3279617856. Its totient is φ = 303668160.

The previous prime is 1252631473. The next prime is 1252631491. The reversal of 1252631490 is 941362521.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1252631491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1897597 + ... + 1898256.

It is an arithmetic number, because the mean of its divisors is an integer number (102488058).

Almost surely, 2^1252631490 is an apocalyptic number.

1252631490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1252631490 is an abundant number, since it is smaller than the sum of its proper divisors (2026986366).

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

1252631490 is a wasteful number, since it uses less digits than its factorization.

1252631490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795874.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1252631490 is about 35392.5343822677. The cubic root of 1252631490 is about 1077.9727316314.

The spelling of 1252631490 in words is "one billion, two hundred fifty-two million, six hundred thirty-one thousand, four hundred ninety".