142645321 has 24 divisors (see below), whose sum is σ = 180003264. Its totient is φ = 112039200.

The previous prime is 142645309. The next prime is 142645339. The reversal of 142645321 is 123546241.

It is not a de Polignac number, because 142645321 - 2⁵ = 142645289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142645321.

It is not an unprimeable number, because it can be changed into a prime (142645381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95446 + ... + 96928.

It is an arithmetic number, because the mean of its divisors is an integer number (7500136).

Almost surely, 2^142645321 is an apocalyptic number.

It is an amenable number.

142645321 is a deficient number, since it is larger than the sum of its proper divisors (37357943).

142645321 is a wasteful number, since it uses less digits than its factorization.

142645321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661 (or 1654 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 142645321 is about 11943.4216621536. The cubic root of 142645321 is about 522.4994571242.

The spelling of 142645321 in words is "one hundred forty-two million, six hundred forty-five thousand, three hundred twenty-one".