172571090 has 8 divisors (see below), whose sum is σ = 310627980. Its totient is φ = 69028432.

The previous prime is 172571059. The next prime is 172571117. The reversal of 172571090 is 90175271.

It can be written as a sum of positive squares in 2 ways, for example, as 167935681 + 4635409 = 12959^2 + 2153^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×172571090² = 59561562207576200, which contains 22 as substring.

It is an unprimeable number.

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, 8628545 + ... + 8628564.

Almost surely, 2^172571090 is an apocalyptic number.

172571090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172571090 is a deficient number, since it is larger than the sum of its proper divisors (138056890).

172571090 is a wasteful number, since it uses less digits than its factorization.

172571090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17257116.

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 172571090 is about 13136.6316078362. The cubic root of 172571090 is about 556.7446008630.

The spelling of 172571090 in words is "one hundred seventy-two million, five hundred seventy-one thousand, ninety".