142392861 has 12 divisors (see below), whose sum is σ = 221500188. Its totient is φ = 87626304.

The previous prime is 142392853. The next prime is 142392863. The reversal of 142392861 is 168293241.

It can be written as a sum of positive squares in 2 ways, for example, as 19316025 + 123076836 = 4395^2 + 11094^2 .

It is not a de Polignac number, because 142392861 - 2³ = 142392853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142392863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 608400 + ... + 608633.

It is an arithmetic number, because the mean of its divisors is an integer number (18458349).

Almost surely, 2^142392861 is an apocalyptic number.

It is an amenable number.

142392861 is a deficient number, since it is larger than the sum of its proper divisors (79107327).

142392861 is a wasteful number, since it uses less digits than its factorization.

142392861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217052 (or 1217049 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 142392861 is about 11932.8479836123. The cubic root of 142392861 is about 522.1910275433.

The spelling of 142392861 in words is "one hundred forty-two million, three hundred ninety-two thousand, eight hundred sixty-one".