1252126187 has 16 divisors (see below), whose sum is σ = 1410124800. Its totient is φ = 1103157792.

The previous prime is 1252126181. The next prime is 1252126207. The reversal of 1252126187 is 7816212521.

It is a cyclic number.

It is not a de Polignac number, because 1252126187 - 2⁴ = 1252126171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1252126181) 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, 141314 + ... + 149912.

It is an arithmetic number, because the mean of its divisors is an integer number (88132800).

Almost surely, 2^1252126187 is an apocalyptic number.

1252126187 is a deficient number, since it is larger than the sum of its proper divisors (157998613).

1252126187 is a wasteful number, since it uses less digits than its factorization.

1252126187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9122.

The product of its digits is 13440, while the sum is 35.

The square root of 1252126187 is about 35385.3951087168. The cubic root of 1252126187 is about 1077.8277631872.

The spelling of 1252126187 in words is "one billion, two hundred fifty-two million, one hundred twenty-six thousand, one hundred eighty-seven".