142590921 has 16 divisors (see below), whose sum is σ = 208156608. Its totient is φ = 86105600.

The previous prime is 142590913. The next prime is 142590923. The reversal of 142590921 is 129095241.

It is a cyclic number.

It is not a de Polignac number, because 142590921 - 2³ = 142590913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (142590923) 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, 1585 + ... + 16961.

It is an arithmetic number, because the mean of its divisors is an integer number (13009788).

Almost surely, 2^142590921 is an apocalyptic number.

142590921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142590921 is a deficient number, since it is larger than the sum of its proper divisors (65565687).

142590921 is a wasteful number, since it uses less digits than its factorization.

142590921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15672.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 142590921 is about 11941.1440406688. The cubic root of 142590921 is about 522.4330275950.

The spelling of 142590921 in words is "one hundred forty-two million, five hundred ninety thousand, nine hundred twenty-one".