172126655 has 8 divisors (see below), whose sum is σ = 206651952. Its totient is φ = 137634688.

The previous prime is 172126639. The next prime is 172126657. The reversal of 172126655 is 556621271.

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

It is a cyclic number.

It is not a de Polignac number, because 172126655 - 2⁴ = 172126639 is a prime.

It is a super-2 number, since 2×172126655² = 59255170722978050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172126657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4964 + ... + 19206.

It is an arithmetic number, because the mean of its divisors is an integer number (25831494).

Almost surely, 2^172126655 is an apocalyptic number.

172126655 is a deficient number, since it is larger than the sum of its proper divisors (34525297).

172126655 is a wasteful number, since it uses less digits than its factorization.

172126655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16665.

The product of its digits is 25200, while the sum is 35.

The square root of 172126655 is about 13119.7048366188. The cubic root of 172126655 is about 556.2662482314.

The spelling of 172126655 in words is "one hundred seventy-two million, one hundred twenty-six thousand, six hundred fifty-five".