142894978 has 8 divisors (see below), whose sum is σ = 214852860. Its totient is φ = 71277360.

The previous prime is 142894957. The next prime is 142895003. The reversal of 142894978 is 879498241.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 135094129 + 7800849 = 11623^2 + 2793^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84013 + ... + 85696.

Almost surely, 2^142894978 is an apocalyptic number.

142894978 is a deficient number, since it is larger than the sum of its proper divisors (71957882).

142894978 is a wasteful number, since it uses less digits than its factorization.

142894978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170132.

The product of its digits is 1161216, while the sum is 52.

The square root of 142894978 is about 11953.8687461424. The cubic root of 142894978 is about 522.8041046192.

The spelling of 142894978 in words is "one hundred forty-two million, eight hundred ninety-four thousand, nine hundred seventy-eight".