1258550399 has 2 divisors, whose sum is σ = 1258550400. Its totient is φ = 1258550398.

The previous prime is 1258550393. The next prime is 1258550401. The reversal of 1258550399 is 9930558521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1258550399 - 2¹⁶ = 1258484863 is a prime.

It is a Sophie Germain prime.

Together with 1258550401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1258550393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629275199 + 629275200.

It is an arithmetic number, because the mean of its divisors is an integer number (629275200).

Almost surely, 2^1258550399 is an apocalyptic number.

1258550399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1258550399 is an equidigital number, since it uses as much as digits as its factorization.

1258550399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486000, while the sum is 47.

The square root of 1258550399 is about 35476.0538814564. The cubic root of 1258550399 is about 1079.6679360349.

The spelling of 1258550399 in words is "one billion, two hundred fifty-eight million, five hundred fifty thousand, three hundred ninety-nine".