1258857923 has 2 divisors, whose sum is σ = 1258857924. Its totient is φ = 1258857922.

The previous prime is 1258857893. The next prime is 1258857947. The reversal of 1258857923 is 3297588521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1258857923 - 2¹⁰ = 1258856899 is a prime.

It is a super-3 number, since 3×1258857923³ (a number of 28 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1258857953) 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, 629428961 + 629428962.

It is an arithmetic number, because the mean of its divisors is an integer number (629428962).

Almost surely, 2^1258857923 is an apocalyptic number.

1258857923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1258857923 is an equidigital number, since it uses as much as digits as its factorization.

1258857923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 50.

The square root of 1258857923 is about 35480.3878642836. The cubic root of 1258857923 is about 1079.7558670289.

The spelling of 1258857923 in words is "one billion, two hundred fifty-eight million, eight hundred fifty-seven thousand, nine hundred twenty-three".