142656644 has 12 divisors (see below), whose sum is σ = 268853004. Its totient is φ = 65841504.

The previous prime is 142656641. The next prime is 142656653. The reversal of 142656644 is 446656241.

It can be written as a sum of positive squares in 2 ways, for example, as 76038400 + 66618244 = 8720^2 + 8162^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142656598 and 142656607.

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 3 ways as a sum of consecutive naturals, for example, 1371647 + ... + 1371750.

It is an arithmetic number, because the mean of its divisors is an integer number (22404417).

Almost surely, 2^142656644 is an apocalyptic number.

It is an amenable number.

142656644 is a deficient number, since it is larger than the sum of its proper divisors (126196360).

142656644 is a wasteful number, since it uses less digits than its factorization.

142656644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743414 (or 2743412 counting only the distinct ones).

The product of its digits is 138240, while the sum is 38.

The square root of 142656644 is about 11943.8956793837. The cubic root of 142656644 is about 522.5132818675.

The spelling of 142656644 in words is "one hundred forty-two million, six hundred fifty-six thousand, six hundred forty-four".