3290921 has 4 divisors (see below), whose sum is σ = 3337344. Its totient is φ = 3244500.

The previous prime is 3290887. The next prime is 3290927. The reversal of 3290921 is 1290923.

3290921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3290921 is a prime.

It is a super-2 number, since 2×3290921² = 21660322056482, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3290927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23105 + ... + 23246.

It is an arithmetic number, because the mean of its divisors is an integer number (834336).

Almost surely, 2^3290921 is an apocalyptic number.

It is an amenable number.

3290921 is a deficient number, since it is larger than the sum of its proper divisors (46423).

3290921 is an equidigital number, since it uses as much as digits as its factorization.

3290921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46422.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 3290921 is about 1814.0895788246. The cubic root of 3290921 is about 148.7438958962.

Subtracting from 3290921 its sum of digits (26), we obtain a triangular number (3290895 = T₂₅₆₅).

The spelling of 3290921 in words is "three million, two hundred ninety thousand, nine hundred twenty-one".