325661 has 4 divisors (see below), whose sum is σ = 372192. Its totient is φ = 279132.

The previous prime is 325643. The next prime is 325667. The reversal of 325661 is 166523.

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: 166523 = 7 ⋅23789.

It is not a de Polignac number, because 325661 - 2⁶ = 325597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325667) 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, 23255 + ... + 23268.

It is an arithmetic number, because the mean of its divisors is an integer number (93048).

2³²⁵⁶⁶¹ is an apocalyptic number.

It is an amenable number.

325661 is a deficient number, since it is larger than the sum of its proper divisors (46531).

325661 is an equidigital number, since it uses as much as digits as its factorization.

325661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46530.

The product of its digits is 1080, while the sum is 23.

The square root of 325661 is about 570.6671534266. The cubic root of 325661 is about 68.8000230981.

The spelling of 325661 in words is "three hundred twenty-five thousand, six hundred sixty-one".