142499979 has 40 divisors (see below), whose sum is σ = 220030272. Its totient is φ = 91854000.

The previous prime is 142499977. The next prime is 142500023. The reversal of 142499979 is 979994241.

142499979 is a `hidden beast` number, since 142 + 499 + 9 + 7 + 9 = 666.

It is not a de Polignac number, because 142499979 - 2¹ = 142499977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142499977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 567604 + ... + 567854.

Almost surely, 2^142499979 is an apocalyptic number.

142499979 is a deficient number, since it is larger than the sum of its proper divisors (77530293).

142499979 is a wasteful number, since it uses less digits than its factorization.

142499979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469 (or 460 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 142499979 is about 11937.3355067201. The cubic root of 142499979 is about 522.3219377532.

The spelling of 142499979 in words is "one hundred forty-two million, four hundred ninety-nine thousand, nine hundred seventy-nine".