1252251975 has 72 divisors (see below), whose sum is σ = 2314947072. Its totient is φ = 596419200.

The previous prime is 1252251961. The next prime is 1252252007. The reversal of 1252251975 is 5791522521.

It is a happy number.

It is not a de Polignac number, because 1252251975 - 2¹⁵ = 1252219207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 391332 + ... + 394518.

Almost surely, 2^1252251975 is an apocalyptic number.

1252251975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1252251975 is a deficient number, since it is larger than the sum of its proper divisors (1062695097).

1252251975 is a wasteful number, since it uses less digits than its factorization.

1252251975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257 (or 3239 counting only the distinct ones).

The product of its digits is 63000, while the sum is 39.

The square root of 1252251975 is about 35387.1724640441. The cubic root of 1252251975 is about 1077.8638546664.

The spelling of 1252251975 in words is "one billion, two hundred fifty-two million, two hundred fifty-one thousand, nine hundred seventy-five".