142615978 has 8 divisors (see below), whose sum is σ = 213976800. Its totient is φ = 71290380.

The previous prime is 142615973. The next prime is 142616011. The reversal of 142615978 is 879516241.

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

It is not an unprimeable number, because it can be changed into a prime (142615973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6973 + ... + 18271.

It is an arithmetic number, because the mean of its divisors is an integer number (26747100).

Almost surely, 2^142615978 is an apocalyptic number.

142615978 is a deficient number, since it is larger than the sum of its proper divisors (71360822).

142615978 is a wasteful number, since it uses less digits than its factorization.

142615978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17612.

The product of its digits is 120960, while the sum is 43.

The square root of 142615978 is about 11942.1931821588. The cubic root of 142615978 is about 522.4636275742.

The spelling of 142615978 in words is "one hundred forty-two million, six hundred fifteen thousand, nine hundred seventy-eight".