601220621 has 4 divisors (see below), whose sum is σ = 627360672. Its totient is φ = 575080572.

The previous prime is 601220617. The next prime is 601220671. The reversal of 601220621 is 126022106.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 601220621 - 2² = 601220617 is a prime.

It is a super-2 number, since 2×601220621² = 722932470231251282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 601220593 and 601220602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601220671) 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, 13069991 + ... + 13070036.

It is an arithmetic number, because the mean of its divisors is an integer number (156840168).

Almost surely, 2^601220621 is an apocalyptic number.

It is an amenable number.

601220621 is a deficient number, since it is larger than the sum of its proper divisors (26140051).

601220621 is a wasteful number, since it uses less digits than its factorization.

601220621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26140050.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 601220621 is about 24519.8005905431. The cubic root of 601220621 is about 844.0042287884.

Adding to 601220621 its reverse (126022106), we get a palindrome (727242727).

The spelling of 601220621 in words is "six hundred one million, two hundred twenty thousand, six hundred twenty-one".