325621 has 4 divisors (see below), whose sum is σ = 331200. Its totient is φ = 320044.

The previous prime is 325607. The next prime is 325627. The reversal of 325621 is 126523.

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, and also an emirpimes, since its reverse is a distinct semiprime: 126523 = 23 ⋅5501.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-325621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325627) 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, 2701 + ... + 2818.

It is an arithmetic number, because the mean of its divisors is an integer number (82800).

2³²⁵⁶²¹ is an apocalyptic number.

It is an amenable number.

325621 is a deficient number, since it is larger than the sum of its proper divisors (5579).

325621 is an equidigital number, since it uses as much as digits as its factorization.

325621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5578.

The product of its digits is 360, while the sum is 19.

The square root of 325621 is about 570.6321056513. The cubic root of 325621 is about 68.7972061467.

It can be divided in two parts, 325 and 621, that added together give a triangular number (946 = T₄₃).

The spelling of 325621 in words is "three hundred twenty-five thousand, six hundred twenty-one".