120813656 has 8 divisors (see below), whose sum is σ = 226525620. Its totient is φ = 60406824.

The previous prime is 120813653. The next prime is 120813661. The reversal of 120813656 is 656318021.

It is a happy number.

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 (120813653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7550846 + ... + 7550861.

Almost surely, 2^120813656 is an apocalyptic number.

It is an amenable number.

120813656 is a deficient number, since it is larger than the sum of its proper divisors (105711964).

120813656 is a wasteful number, since it uses less digits than its factorization.

120813656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15101713 (or 15101709 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 120813656 is about 10991.5265545783. The cubic root of 120813656 is about 494.3547092671.

The spelling of 120813656 in words is "one hundred twenty million, eight hundred thirteen thousand, six hundred fifty-six".