142758664 has 8 divisors (see below), whose sum is σ = 267672510. Its totient is φ = 71379328.

The previous prime is 142758661. The next prime is 142758697. The reversal of 142758664 is 466857241.

It can be written as a sum of positive squares in only one way, i.e., 137874564 + 4884100 = 11742^2 + 2210^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×142758664² = 40760072294129792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 142758664.

It is not an unprimeable number, because it can be changed into a prime (142758661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8922409 + ... + 8922424.

Almost surely, 2^142758664 is an apocalyptic number.

It is an amenable number.

142758664 is a deficient number, since it is larger than the sum of its proper divisors (124913846).

142758664 is a wasteful number, since it uses less digits than its factorization.

142758664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17844839 (or 17844835 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 142758664 is about 11948.1657169626. The cubic root of 142758664 is about 522.6378095474.

The spelling of 142758664 in words is "one hundred forty-two million, seven hundred fifty-eight thousand, six hundred sixty-four".