325561 has 4 divisors (see below), whose sum is σ = 326800. Its totient is φ = 324324.

The previous prime is 325543. The next prime is 325571. The reversal of 325561 is 165523.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 325561 - 2¹⁵ = 292793 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 325561.

It is not an unprimeable number, because it can be changed into a prime (325541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51 + ... + 808.

It is an arithmetic number, because the mean of its divisors is an integer number (81700).

2³²⁵⁵⁶¹ is an apocalyptic number.

It is an amenable number.

325561 is a deficient number, since it is larger than the sum of its proper divisors (1239).

325561 is an equidigital number, since it uses as much as digits as its factorization.

325561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238.

The product of its digits is 900, while the sum is 22.

The square root of 325561 is about 570.5795299518. The cubic root of 325561 is about 68.7929802870.

The spelling of 325561 in words is "three hundred twenty-five thousand, five hundred sixty-one".