142860321 has 8 divisors (see below), whose sum is σ = 211644960. Its totient is φ = 95240196.

The previous prime is 142860269. The next prime is 142860329. The reversal of 142860321 is 123068241.

142860321 is a `hidden beast` number, since 14 + 28 + 603 + 21 = 666.

It is not a de Polignac number, because 142860321 - 2¹¹ = 142858273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5291123 = 142860321 / (1 + 4 + 2 + 8 + 6 + 0 + 3 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (142860329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2645535 + ... + 2645588.

It is an arithmetic number, because the mean of its divisors is an integer number (26455620).

Almost surely, 2^142860321 is an apocalyptic number.

It is an amenable number.

142860321 is a deficient number, since it is larger than the sum of its proper divisors (68784639).

142860321 is an equidigital number, since it uses as much as digits as its factorization.

142860321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5291132 (or 5291126 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 142860321 is about 11952.4190438589. The cubic root of 142860321 is about 522.7618351447.

The spelling of 142860321 in words is "one hundred forty-two million, eight hundred sixty thousand, three hundred twenty-one".