142979815 has 8 divisors (see below), whose sum is σ = 187173648. Its totient is φ = 103985280.

The previous prime is 142979797. The next prime is 142979827. The reversal of 142979815 is 518979241.

142979815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142979815 - 2¹³ = 142971623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1299762 + ... + 1299871.

It is an arithmetic number, because the mean of its divisors is an integer number (23396706).

Almost surely, 2^142979815 is an apocalyptic number.

142979815 is a deficient number, since it is larger than the sum of its proper divisors (44193833).

142979815 is a wasteful number, since it uses less digits than its factorization.

142979815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599649.

The product of its digits is 181440, while the sum is 46.

The square root of 142979815 is about 11957.4167360680. The cubic root of 142979815 is about 522.9075473896.

The spelling of 142979815 in words is "one hundred forty-two million, nine hundred seventy-nine thousand, eight hundred fifteen".