172249057 has 4 divisors (see below), whose sum is σ = 172703920. Its totient is φ = 171794196.

The previous prime is 172249043. The next prime is 172249061. The reversal of 172249057 is 750942271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 750942271 = 7457 ⋅100703.

It is a cyclic number.

It is not a de Polignac number, because 172249057 - 2²³ = 163860449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172249037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226863 + ... + 227620.

It is an arithmetic number, because the mean of its divisors is an integer number (43175980).

Almost surely, 2^172249057 is an apocalyptic number.

It is an amenable number.

172249057 is a deficient number, since it is larger than the sum of its proper divisors (454863).

172249057 is an equidigital number, since it uses as much as digits as its factorization.

172249057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454862.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 172249057 is about 13124.3688229187. The cubic root of 172249057 is about 556.3980735786.

The spelling of 172249057 in words is "one hundred seventy-two million, two hundred forty-nine thousand, fifty-seven".