142490978 has 16 divisors (see below), whose sum is σ = 252694080. Its totient is φ = 58961616.

The previous prime is 142490941. The next prime is 142490989. The reversal of 142490978 is 879094241.

It is a super-2 number, since 2×142490978² = 40607357622792968, which contains 22 as substring.

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, 175076 + ... + 175887.

It is an arithmetic number, because the mean of its divisors is an integer number (15793380).

Almost surely, 2^142490978 is an apocalyptic number.

142490978 is a deficient number, since it is larger than the sum of its proper divisors (110203102).

142490978 is a wasteful number, since it uses less digits than its factorization.

142490978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351001.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 142490978 is about 11936.9584903358. The cubic root of 142490978 is about 522.3109400469.

The spelling of 142490978 in words is "one hundred forty-two million, four hundred ninety thousand, nine hundred seventy-eight".