3251921 has 4 divisors (see below), whose sum is σ = 3313332. Its totient is φ = 3190512.

The previous prime is 3251917. The next prime is 3251923. The reversal of 3251921 is 1291523.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2768896 + 483025 = 1664^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 3251921 - 2² = 3251917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3251923) 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, 30626 + ... + 30731.

It is an arithmetic number, because the mean of its divisors is an integer number (828333).

Almost surely, 2^3251921 is an apocalyptic number.

It is an amenable number.

3251921 is a deficient number, since it is larger than the sum of its proper divisors (61411).

3251921 is an equidigital number, since it uses as much as digits as its factorization.

3251921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61410.

The product of its digits is 540, while the sum is 23.

The square root of 3251921 is about 1803.3083485638. The cubic root of 3251921 is about 148.1539820565.

The spelling of 3251921 in words is "three million, two hundred fifty-one thousand, nine hundred twenty-one".