142931321 has 16 divisors (see below), whose sum is σ = 156038400. Its totient is φ = 130142208.

The previous prime is 142931311. The next prime is 142931329. The reversal of 142931321 is 123139241.

142931321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 142931321 - 2²⁶ = 75822457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142931329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 556025 + ... + 556281.

It is an arithmetic number, because the mean of its divisors is an integer number (9752400).

Almost surely, 2^142931321 is an apocalyptic number.

It is an amenable number.

142931321 is a deficient number, since it is larger than the sum of its proper divisors (13107079).

142931321 is a wasteful number, since it uses less digits than its factorization.

142931321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688.

The product of its digits is 1296, while the sum is 26.

The square root of 142931321 is about 11955.3887849789. The cubic root of 142931321 is about 522.8484230859.

The spelling of 142931321 in words is "one hundred forty-two million, nine hundred thirty-one thousand, three hundred twenty-one".