601056721 has 4 divisors (see below), whose sum is σ = 601208932. Its totient is φ = 600904512.

The previous prime is 601056713. The next prime is 601056733. The reversal of 601056721 is 127650106.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 336539025 + 264517696 = 18345^2 + 16264^2 .

It is a cyclic number.

It is not a de Polignac number, because 601056721 - 2³ = 601056713 is a prime.

It is a super-2 number, since 2×601056721² = 722538363718543682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 601056721.

It is not an unprimeable number, because it can be changed into a prime (601056751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70020 + ... + 78133.

It is an arithmetic number, because the mean of its divisors is an integer number (150302233).

Almost surely, 2^601056721 is an apocalyptic number.

It is an amenable number.

601056721 is a deficient number, since it is larger than the sum of its proper divisors (152211).

601056721 is a wasteful number, since it uses less digits than its factorization.

601056721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152210.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 601056721 is about 24516.4581658934. The cubic root of 601056721 is about 843.9275265705.

The spelling of 601056721 in words is "six hundred one million, fifty-six thousand, seven hundred twenty-one".