172142655 has 16 divisors (see below), whose sum is σ = 275595264. Its totient is φ = 91753760.

The previous prime is 172142653. The next prime is 172142657. The reversal of 172142655 is 556241271.

It is an interprime number because it is at equal distance from previous prime (172142653) and next prime (172142657).

It is not a de Polignac number, because 172142655 - 2¹ = 172142653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172142651) 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 15 ways as a sum of consecutive naturals, for example, 38170 + ... + 42440.

It is an arithmetic number, because the mean of its divisors is an integer number (17224704).

Almost surely, 2^172142655 is an apocalyptic number.

172142655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172142655 is a deficient number, since it is larger than the sum of its proper divisors (103452609).

172142655 is a wasteful number, since it uses less digits than its factorization.

172142655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6966.

The product of its digits is 16800, while the sum is 33.

The square root of 172142655 is about 13120.3145922649. The cubic root of 172142655 is about 556.2834835712.

The spelling of 172142655 in words is "one hundred seventy-two million, one hundred forty-two thousand, six hundred fifty-five".