142049979 has 24 divisors (see below), whose sum is σ = 208894400. Its totient is φ = 93000960.

The previous prime is 142049969. The next prime is 142050037. The reversal of 142049979 is 979940241.

It is a happy number.

It is not a de Polignac number, because 142049979 - 2⁸ = 142049723 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142049959) 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, 170937 + ... + 171765.

Almost surely, 2^142049979 is an apocalyptic number.

142049979 is a deficient number, since it is larger than the sum of its proper divisors (66844421).

142049979 is a wasteful number, since it uses less digits than its factorization.

142049979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155 (or 1152 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 142049979 is about 11918.4721755769. The cubic root of 142049979 is about 521.7715453384.

The spelling of 142049979 in words is "one hundred forty-two million, forty-nine thousand, nine hundred seventy-nine".