3365621 has 4 divisors (see below), whose sum is σ = 3846432. Its totient is φ = 2884812.

The previous prime is 3365617. The next prime is 3365629. The reversal of 3365621 is 1265633.

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: 1265633 = 17 ⋅74449.

It is not a de Polignac number, because 3365621 - 2² = 3365617 is a prime.

It is a super-2 number, since 2×3365621² = 22654809431282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3365629) 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, 240395 + ... + 240408.

It is an arithmetic number, because the mean of its divisors is an integer number (961608).

Almost surely, 2^3365621 is an apocalyptic number.

It is an amenable number.

3365621 is a deficient number, since it is larger than the sum of its proper divisors (480811).

3365621 is an equidigital number, since it uses as much as digits as its factorization.

3365621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480810.

The product of its digits is 3240, while the sum is 26.

The square root of 3365621 is about 1834.5628907181. The cubic root of 3365621 is about 149.8609229422.

The spelling of 3365621 in words is "three million, three hundred sixty-five thousand, six hundred twenty-one".