142977188 has 12 divisors (see below), whose sum is σ = 251285580. Its totient is φ = 71181312.

The previous prime is 142977179. The next prime is 142977203. The reversal of 142977188 is 881779241.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 78464164 + 64513024 = 8858^2 + 8032^2 .

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, 75773 + ... + 77636.

It is an arithmetic number, because the mean of its divisors is an integer number (20940465).

Almost surely, 2^142977188 is an apocalyptic number.

It is an amenable number.

142977188 is a deficient number, since it is larger than the sum of its proper divisors (108308392).

142977188 is a wasteful number, since it uses less digits than its factorization.

142977188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153646 (or 153644 counting only the distinct ones).

The product of its digits is 225792, while the sum is 47.

The square root of 142977188 is about 11957.3068874224. The cubic root of 142977188 is about 522.9043448710.

The spelling of 142977188 in words is "one hundred forty-two million, nine hundred seventy-seven thousand, one hundred eighty-eight".