142804621 has 4 divisors (see below), whose sum is σ = 142927744. Its totient is φ = 142681500.

The previous prime is 142804619. The next prime is 142804637. The reversal of 142804621 is 126408241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142804621 - 2¹ = 142804619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142804621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142804601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59805 + ... + 62146.

It is an arithmetic number, because the mean of its divisors is an integer number (35731936).

Almost surely, 2^142804621 is an apocalyptic number.

It is an amenable number.

142804621 is a deficient number, since it is larger than the sum of its proper divisors (123123).

142804621 is a wasteful number, since it uses less digits than its factorization.

142804621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123122.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 142804621 is about 11950.0887444404. The cubic root of 142804621 is about 522.6938862114.

The spelling of 142804621 in words is "one hundred forty-two million, eight hundred four thousand, six hundred twenty-one".