258064621 has 2 divisors, whose sum is σ = 258064622. Its totient is φ = 258064620.

The previous prime is 258064613. The next prime is 258064627. The reversal of 258064621 is 126460852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 257955721 + 108900 = 16061^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 258064621 - 2³ = 258064613 is a prime.

It is a super-2 number, since 2×258064621² = 133194697223747282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258064627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129032310 + 129032311.

It is an arithmetic number, because the mean of its divisors is an integer number (129032311).

Almost surely, 2^258064621 is an apocalyptic number.

It is an amenable number.

258064621 is a deficient number, since it is larger than the sum of its proper divisors (1).

258064621 is an equidigital number, since it uses as much as digits as its factorization.

258064621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 258064621 is about 16064.3898421322. The cubic root of 258064621 is about 636.6628219328.

The spelling of 258064621 in words is "two hundred fifty-eight million, sixty-four thousand, six hundred twenty-one".