1252991877 has 8 divisors (see below), whose sum is σ = 1673366016. Its totient is φ = 833972832.

The previous prime is 1252991843. The next prime is 1252991881. The reversal of 1252991877 is 7781992521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1252991877 - 2¹² = 1252987781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252791877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336613 + ... + 340314.

It is an arithmetic number, because the mean of its divisors is an integer number (209170752).

Almost surely, 2^1252991877 is an apocalyptic number.

It is an amenable number.

1252991877 is a deficient number, since it is larger than the sum of its proper divisors (420374139).

1252991877 is an equidigital number, since it uses as much as digits as its factorization.

1252991877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677547.

The product of its digits is 635040, while the sum is 51.

The square root of 1252991877 is about 35397.6253017063. The cubic root of 1252991877 is about 1078.0761007152.

The spelling of 1252991877 in words is "one billion, two hundred fifty-two million, nine hundred ninety-one thousand, eight hundred seventy-seven".