621043120 has 160 divisors (see below), whose sum is σ = 1602129600. Its totient is φ = 222953472.

The previous prime is 621043117. The next prime is 621043123. The reversal of 621043120 is 21340126.

It is an interprime number because it is at equal distance from previous prime (621043117) and next prime (621043123).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (621043123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3217744 + ... + 3217936.

It is an arithmetic number, because the mean of its divisors is an integer number (10013310).

Almost surely, 2^621043120 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 621043120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (801064800).

621043120 is an abundant number, since it is smaller than the sum of its proper divisors (981086480).

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

621043120 is a wasteful number, since it uses less digits than its factorization.

621043120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 621043120 is about 24920.7367467336. The cubic root of 621043120 is about 853.1798402849.

Adding to 621043120 its reverse (21340126), we get a palindrome (642383246).

The spelling of 621043120 in words is "six hundred twenty-one million, forty-three thousand, one hundred twenty".