172140755 has 32 divisors (see below), whose sum is σ = 218792448. Its totient is φ = 129888000.

The previous prime is 172140751. The next prime is 172140769. The reversal of 172140755 is 557041271.

It is not a de Polignac number, because 172140755 - 2² = 172140751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172140751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1139930 + ... + 1140080.

It is an arithmetic number, because the mean of its divisors is an integer number (6837264).

Almost surely, 2^172140755 is an apocalyptic number.

172140755 is a deficient number, since it is larger than the sum of its proper divisors (46651693).

172140755 is a wasteful number, since it uses less digits than its factorization.

172140755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347.

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 172140755 is about 13120.2421852647. The cubic root of 172140755 is about 556.2814369305.

The spelling of 172140755 in words is "one hundred seventy-two million, one hundred forty thousand, seven hundred fifty-five".