172412665 has 8 divisors (see below), whose sum is σ = 208092168. Its totient is φ = 137132160.

The previous prime is 172412659. The next prime is 172412677. The reversal of 172412665 is 566214271.

It can be written as a sum of positive squares in 4 ways, for example, as 101364624 + 71048041 = 10068^2 + 8429^2 .

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

It is not a de Polignac number, because 172412665 - 2²³ = 164024057 is a prime.

It is a super-4 number, since 4×172412665⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172412665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98796 + ... + 100525.

It is an arithmetic number, because the mean of its divisors is an integer number (26011521).

Almost surely, 2^172412665 is an apocalyptic number.

It is an amenable number.

172412665 is a deficient number, since it is larger than the sum of its proper divisors (35679503).

172412665 is a wasteful number, since it uses less digits than its factorization.

172412665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199499.

The product of its digits is 20160, while the sum is 34.

The square root of 172412665 is about 13130.6003290025. The cubic root of 172412665 is about 556.5741797574.

The spelling of 172412665 in words is "one hundred seventy-two million, four hundred twelve thousand, six hundred sixty-five".