172142097 has 16 divisors (see below), whose sum is σ = 240952320. Its totient is φ = 109107152.

The previous prime is 172142081. The next prime is 172142099. The reversal of 172142097 is 790241271.

It is a cyclic number.

It is not a de Polignac number, because 172142097 - 2⁴ = 172142081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172142099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4054 + ... + 18992.

It is an arithmetic number, because the mean of its divisors is an integer number (15059520).

Almost surely, 2^172142097 is an apocalyptic number.

It is an amenable number.

172142097 is a deficient number, since it is larger than the sum of its proper divisors (68810223).

172142097 is a wasteful number, since it uses less digits than its factorization.

172142097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15132.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 172142097 is about 13120.2933275137. The cubic root of 172142097 is about 556.2828825067.

The spelling of 172142097 in words is "one hundred seventy-two million, one hundred forty-two thousand, ninety-seven".