1251055879 has 2 divisors, whose sum is σ = 1251055880. Its totient is φ = 1251055878.

The previous prime is 1251055873. The next prime is 1251055903. The reversal of 1251055879 is 9785501521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1251055879 - 2⁵ = 1251055847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251055873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625527939 + 625527940.

It is an arithmetic number, because the mean of its divisors is an integer number (625527940).

Almost surely, 2^1251055879 is an apocalyptic number.

1251055879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251055879 is an equidigital number, since it uses as much as digits as its factorization.

1251055879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126000, while the sum is 43.

The square root of 1251055879 is about 35370.2682913206. The cubic root of 1251055879 is about 1077.5205692999.

The spelling of 1251055879 in words is "one billion, two hundred fifty-one million, fifty-five thousand, eight hundred seventy-nine".