164458121 has 2 divisors, whose sum is σ = 164458122. Its totient is φ = 164458120.

The previous prime is 164458117. The next prime is 164458207. The reversal of 164458121 is 121854461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164121721 + 336400 = 12811^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 164458121 - 2² = 164458117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (164458321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82229060 + 82229061.

It is an arithmetic number, because the mean of its divisors is an integer number (82229061).

Almost surely, 2^164458121 is an apocalyptic number.

It is an amenable number.

164458121 is a deficient number, since it is larger than the sum of its proper divisors (1).

164458121 is an equidigital number, since it uses as much as digits as its factorization.

164458121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 32.

The square root of 164458121 is about 12824.1226210607. The cubic root of 164458121 is about 547.8795722102.

The spelling of 164458121 in words is "one hundred sixty-four million, four hundred fifty-eight thousand, one hundred twenty-one".