601221620 has 48 divisors (see below), whose sum is σ = 1313625600. Its totient is φ = 230858880.

The previous prime is 601221563. The next prime is 601221641. The reversal of 601221620 is 26122106.

It is a happy number.

It is a super-2 number, since 2×601221620² = 722934872710848800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 601221592 and 601221601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100925 + ... + 106715.

It is an arithmetic number, because the mean of its divisors is an integer number (27367200).

Almost surely, 2^601221620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 601221620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (656812800).

601221620 is an abundant number, since it is smaller than the sum of its proper divisors (712403980).

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

601221620 is a wasteful number, since it uses less digits than its factorization.

601221620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008 (or 6006 counting only the distinct ones).

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

The square root of 601221620 is about 24519.8209618260. The cubic root of 601221620 is about 844.0046962595.

Adding to 601221620 its reverse (26122106), we get a palindrome (627343726).

The spelling of 601221620 in words is "six hundred one million, two hundred twenty-one thousand, six hundred twenty".