1252101650 has 12 divisors (see below), whose sum is σ = 2328909162. Its totient is φ = 500840640.

The previous prime is 1252101581. The next prime is 1252101661. The reversal of 1252101650 is 561012521.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1134140329 + 117961321 = 33677^2 + 10861^2 .

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12520967 + ... + 12521066.

Almost surely, 2^1252101650 is an apocalyptic number.

1252101650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1252101650 is a deficient number, since it is larger than the sum of its proper divisors (1076807512).

1252101650 is a wasteful number, since it uses less digits than its factorization.

1252101650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25042045 (or 25042040 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1252101650 is about 35385.0483961800. The cubic root of 1252101650 is about 1077.8207226740.

The spelling of 1252101650 in words is "one billion, two hundred fifty-two million, one hundred one thousand, six hundred fifty".