142749866 has 16 divisors (see below), whose sum is σ = 244890240. Its totient is φ = 61134480.

The previous prime is 142749853. The next prime is 142749889. The reversal of 142749866 is 668947241.

It is a self number, because there is not a number n which added to its sum of digits gives 142749866.

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, 23315 + ... + 28793.

It is an arithmetic number, because the mean of its divisors is an integer number (15305640).

Almost surely, 2^142749866 is an apocalyptic number.

142749866 is a deficient number, since it is larger than the sum of its proper divisors (102140374).

142749866 is a wasteful number, since it uses less digits than its factorization.

142749866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7349.

The product of its digits is 580608, while the sum is 47.

The square root of 142749866 is about 11947.7975376217. The cubic root of 142749866 is about 522.6270728683.

The spelling of 142749866 in words is "one hundred forty-two million, seven hundred forty-nine thousand, eight hundred sixty-six".