258166121 has 2 divisors, whose sum is σ = 258166122. Its totient is φ = 258166120.

The previous prime is 258166093. The next prime is 258166177. The reversal of 258166121 is 121661852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184824025 + 73342096 = 13595^2 + 8564^2 .

It is a cyclic number.

It is not a de Polignac number, because 258166121 - 2¹⁴ = 258149737 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (258166621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129083060 + 129083061.

It is an arithmetic number, because the mean of its divisors is an integer number (129083061).

Almost surely, 2^258166121 is an apocalyptic number.

It is an amenable number.

258166121 is a deficient number, since it is larger than the sum of its proper divisors (1).

258166121 is an equidigital number, since it uses as much as digits as its factorization.

258166121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 32.

The square root of 258166121 is about 16067.5486929401. The cubic root of 258166121 is about 636.7462801069.

The spelling of 258166121 in words is "two hundred fifty-eight million, one hundred sixty-six thousand, one hundred twenty-one".