172041251 has 2 divisors, whose sum is σ = 172041252. Its totient is φ = 172041250.

The previous prime is 172041203. The next prime is 172041269. The reversal of 172041251 is 152140271.

It is a strong prime.

It is an emirp because it is prime and its reverse (152140271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172041251 - 2¹⁸ = 171779107 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172041451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86020625 + 86020626.

It is an arithmetic number, because the mean of its divisors is an integer number (86020626).

Almost surely, 2^172041251 is an apocalyptic number.

172041251 is a deficient number, since it is larger than the sum of its proper divisors (1).

172041251 is an equidigital number, since it uses as much as digits as its factorization.

172041251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 172041251 is about 13116.4496339520. The cubic root of 172041251 is about 556.1742322251.

The spelling of 172041251 in words is "one hundred seventy-two million, forty-one thousand, two hundred fifty-one".