621324 has 48 divisors (see below), whose sum is σ = 1760640. Its totient is φ = 187920.

The previous prime is 621317. The next prime is 621337. The reversal of 621324 is 423126.

It is a happy number.

621324 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 621297 and 621306.

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, 927 + ... + 1449.

It is an arithmetic number, because the mean of its divisors is an integer number (36680).

2⁶²¹³²⁴ 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 621324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (880320).

621324 is an abundant number, since it is smaller than the sum of its proper divisors (1139316).

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

621324 is a wasteful number, since it uses less digits than its factorization.

621324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 539 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 621324 is about 788.2410798734. The cubic root of 621324 is about 85.3308443827.

The spelling of 621324 in words is "six hundred twenty-one thousand, three hundred twenty-four".