3509621 has 8 divisors (see below), whose sum is σ = 3594624. Its totient is φ = 3425760.

The previous prime is 3509591. The next prime is 3509659. The reversal of 3509621 is 1269053.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3509621 - 2¹⁸ = 3247477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3509221) 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 7 ways as a sum of consecutive naturals, for example, 9380 + ... + 9746.

It is an arithmetic number, because the mean of its divisors is an integer number (449328).

Almost surely, 2^3509621 is an apocalyptic number.

It is an amenable number.

3509621 is a deficient number, since it is larger than the sum of its proper divisors (85003).

3509621 is a wasteful number, since it uses less digits than its factorization.

3509621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 3509621 is about 1873.3982491718. The cubic root of 3509621 is about 151.9684404700.

The spelling of 3509621 in words is "three million, five hundred nine thousand, six hundred twenty-one".