142999731 has 24 divisors (see below), whose sum is σ = 237878784. Its totient is φ = 81085680.

The previous prime is 142999723. The next prime is 142999781. The reversal of 142999731 is 137999241.

It is not a de Polignac number, because 142999731 - 2³ = 142999723 is a prime.

It is a super-2 number, since 2×142999731² = 40897846132144722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142999711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 411 + ... + 16916.

It is an arithmetic number, because the mean of its divisors is an integer number (9911616).

Almost surely, 2^142999731 is an apocalyptic number.

142999731 is a deficient number, since it is larger than the sum of its proper divisors (94879053).

142999731 is a wasteful number, since it uses less digits than its factorization.

142999731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17471 (or 17468 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 142999731 is about 11958.2494956411. The cubic root of 142999731 is about 522.9318252762.

The spelling of 142999731 in words is "one hundred forty-two million, nine hundred ninety-nine thousand, seven hundred thirty-one".