3506621 has 4 divisors (see below), whose sum is σ = 3691200. Its totient is φ = 3322044.

The previous prime is 3506567. The next prime is 3506663. The reversal of 3506621 is 1266053.

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 not a de Polignac number, because 3506621 - 2¹⁰ = 3505597 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 (3502621) 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, 92261 + ... + 92298.

It is an arithmetic number, because the mean of its divisors is an integer number (922800).

Almost surely, 2^3506621 is an apocalyptic number.

It is an amenable number.

3506621 is a deficient number, since it is larger than the sum of its proper divisors (184579).

3506621 is a wasteful number, since it uses less digits than its factorization.

3506621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184578.

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

The square root of 3506621 is about 1872.5973939958. The cubic root of 3506621 is about 151.9251275990.

The spelling of 3506621 in words is "three million, five hundred six thousand, six hundred twenty-one".