120645656 has 8 divisors (see below), whose sum is σ = 226210620. Its totient is φ = 60322824.

The previous prime is 120645653. The next prime is 120645667. The reversal of 120645656 is 656546021.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120645653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7540346 + ... + 7540361.

Almost surely, 2^120645656 is an apocalyptic number.

It is an amenable number.

120645656 is a deficient number, since it is larger than the sum of its proper divisors (105564964).

120645656 is a wasteful number, since it uses less digits than its factorization.

120645656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15080713 (or 15080709 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 120645656 is about 10983.8816453929. The cubic root of 120645656 is about 494.1254578175.

The spelling of 120645656 in words is "one hundred twenty million, six hundred forty-five thousand, six hundred fifty-six".