142656642 has 48 divisors (see below), whose sum is σ = 315057600. Its totient is φ = 46644000.

The previous prime is 142656641. The next prime is 142656653. The reversal of 142656642 is 246656241.

142656642 is a `hidden beast` number, since 1 + 4 + 2 + 6 + 5 + 6 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 142656597 and 142656606.

It is not an unprimeable number, because it can be changed into a prime (142656641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237859 + ... + 238457.

It is an arithmetic number, because the mean of its divisors is an integer number (6563700).

Almost surely, 2^142656642 is an apocalyptic number.

142656642 is an abundant number, since it is smaller than the sum of its proper divisors (172400958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142656642 is a wasteful number, since it uses less digits than its factorization.

142656642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839 (or 836 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 142656642 is about 11943.8955956589. The cubic root of 142656642 is about 522.5132794256.

The spelling of 142656642 in words is "one hundred forty-two million, six hundred fifty-six thousand, six hundred forty-two".