142720172 has 24 divisors (see below), whose sum is σ = 300464640. Its totient is φ = 57946320.

The previous prime is 142720169. The next prime is 142720241. The reversal of 142720172 is 271027241.

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, 133604 + ... + 134667.

It is an arithmetic number, because the mean of its divisors is an integer number (12519360).

Almost surely, 2^142720172 is an apocalyptic number.

It is an amenable number.

142720172 is an abundant number, since it is smaller than the sum of its proper divisors (157744468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142720172 is a wasteful number, since it uses less digits than its factorization.

142720172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268301 (or 268299 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 142720172 is about 11946.5548171847. The cubic root of 142720172 is about 522.5908324035.

The spelling of 142720172 in words is "one hundred forty-two million, seven hundred twenty thousand, one hundred seventy-two".