1252377999 has 24 divisors (see below), whose sum is σ = 1836550352. Its totient is φ = 822234240.

The previous prime is 1252377979. The next prime is 1252378009. The reversal of 1252377999 is 9997732521.

It is not a de Polignac number, because 1252377999 - 2¹¹ = 1252375951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252377979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 669864 + ... + 671730.

Almost surely, 2^1252377999 is an apocalyptic number.

1252377999 is a deficient number, since it is larger than the sum of its proper divisors (584172353).

1252377999 is a wasteful number, since it uses less digits than its factorization.

1252377999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967 (or 2964 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 1252377999 is about 35388.9530644804. The cubic root of 1252377999 is about 1077.9000114359.

The spelling of 1252377999 in words is "one billion, two hundred fifty-two million, three hundred seventy-seven thousand, nine hundred ninety-nine".