142331905 has 16 divisors (see below), whose sum is σ = 181131984. Its totient is φ = 106997760.

The previous prime is 142331899. The next prime is 142331911. The reversal of 142331905 is 509133241.

It is an interprime number because it is at equal distance from previous prime (142331899) and next prime (142331911).

It can be written as a sum of positive squares in 8 ways, for example, as 34857216 + 107474689 = 5904^2 + 10367^2 .

It is not a de Polignac number, because 142331905 - 2²¹ = 140234753 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86995 + ... + 88615.

It is an arithmetic number, because the mean of its divisors is an integer number (11320749).

Almost surely, 2^142331905 is an apocalyptic number.

It is an amenable number.

142331905 is a deficient number, since it is larger than the sum of its proper divisors (38800079).

142331905 is a wasteful number, since it uses less digits than its factorization.

142331905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 142331905 is about 11930.2935839819. The cubic root of 142331905 is about 522.1165031624.

The spelling of 142331905 in words is "one hundred forty-two million, three hundred thirty-one thousand, nine hundred five".