601221656 has 32 divisors (see below), whose sum is σ = 1344349440. Its totient is φ = 246463008.

The previous prime is 601221653. The next prime is 601221659. The reversal of 601221656 is 656122106.

601221656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (601221653) and next prime (601221659).

It is a super-2 number, since 2×601221656² = 722934959286764672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601221653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232106 + ... + 234681.

It is an arithmetic number, because the mean of its divisors is an integer number (42010920).

Almost surely, 2^601221656 is an apocalyptic number.

It is an amenable number.

601221656 is an abundant number, since it is smaller than the sum of its proper divisors (743127784).

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

601221656 is a wasteful number, since it uses less digits than its factorization.

601221656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466823 (or 466819 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 601221656 is about 24519.8216959259. The cubic root of 601221656 is about 844.0047131053.

The spelling of 601221656 in words is "six hundred one million, two hundred twenty-one thousand, six hundred fifty-six".