142378664 has 16 divisors (see below), whose sum is σ = 274175700. Its totient is φ = 69265152.

The previous prime is 142378631. The next prime is 142378679. The reversal of 142378664 is 466873241.

It can be written as a sum of positive squares in 2 ways, for example, as 131102500 + 11276164 = 11450^2 + 3358^2 .

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, 240209 + ... + 240800.

Almost surely, 2^142378664 is an apocalyptic number.

It is an amenable number.

142378664 is a deficient number, since it is larger than the sum of its proper divisors (131797036).

142378664 is a wasteful number, since it uses less digits than its factorization.

142378664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481052 (or 481048 counting only the distinct ones).

The product of its digits is 193536, while the sum is 41.

The square root of 142378664 is about 11932.2530982208. The cubic root of 142378664 is about 522.1736722902.

The spelling of 142378664 in words is "one hundred forty-two million, three hundred seventy-eight thousand, six hundred sixty-four".