1252663890 has 32 divisors (see below), whose sum is σ = 3008586240. Its totient is φ = 333800064.

The previous prime is 1252663877. The next prime is 1252663931. The reversal of 1252663890 is 983662521.

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, 28662 + ... + 57678.

It is an arithmetic number, because the mean of its divisors is an integer number (94018320).

Almost surely, 2^1252663890 is an apocalyptic number.

1252663890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1252663890 is an abundant number, since it is smaller than the sum of its proper divisors (1755922350).

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

1252663890 is a wasteful number, since it uses less digits than its factorization.

1252663890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30466.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 1252663890 is about 35392.9921029573. The cubic root of 1252663890 is about 1077.9820256697.

The spelling of 1252663890 in words is "one billion, two hundred fifty-two million, six hundred sixty-three thousand, eight hundred ninety".