142442665 has 16 divisors (see below), whose sum is σ = 175219200. Its totient is φ = 111113920.

The previous prime is 142442647. The next prime is 142442681. The reversal of 142442665 is 566244241.

It is not a de Polignac number, because 142442665 - 2⁵ = 142442633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142442665.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72111 + ... + 74059.

It is an arithmetic number, because the mean of its divisors is an integer number (10951200).

Almost surely, 2^142442665 is an apocalyptic number.

142442665 is the 9745-th pentagonal number.

It is an amenable number.

142442665 is a deficient number, since it is larger than the sum of its proper divisors (32776535).

142442665 is a wasteful number, since it uses less digits than its factorization.

142442665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2312.

The product of its digits is 46080, while the sum is 34.

The square root of 142442665 is about 11934.9346458202. The cubic root of 142442665 is about 522.2519017805.

The spelling of 142442665 in words is "one hundred forty-two million, four hundred forty-two thousand, six hundred sixty-five".