142992731 has 12 divisors (see below), whose sum is σ = 166562208. Its totient is φ = 122400432.

The previous prime is 142992721. The next prime is 142992757. The reversal of 142992731 is 137299241.

142992731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-142992731 is a prime.

It is a super-2 number, since 2×142992731² = 40893842237676722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142992701) 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, 47390 + ... + 50316.

It is an arithmetic number, because the mean of its divisors is an integer number (13880184).

Almost surely, 2^142992731 is an apocalyptic number.

142992731 is a deficient number, since it is larger than the sum of its proper divisors (23569477).

142992731 is an equidigital number, since it uses as much as digits as its factorization.

142992731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938 (or 3931 counting only the distinct ones).

The product of its digits is 27216, while the sum is 38.

The square root of 142992731 is about 11957.9568070804. The cubic root of 142992731 is about 522.9232924338.

The spelling of 142992731 in words is "one hundred forty-two million, nine hundred ninety-two thousand, seven hundred thirty-one".