3406521 has 8 divisors (see below), whose sum is σ = 4578304. Its totient is φ = 2252880.

The previous prime is 3406493. The next prime is 3406523. The reversal of 3406521 is 1256043.

It is a happy number.

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

It is not a de Polignac number, because 3406521 - 2⁵ = 3406489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3406523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4090 + ... + 4851.

It is an arithmetic number, because the mean of its divisors is an integer number (572288).

Almost surely, 2^3406521 is an apocalyptic number.

It is an amenable number.

3406521 is a deficient number, since it is larger than the sum of its proper divisors (1171783).

3406521 is a wasteful number, since it uses less digits than its factorization.

3406521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9071.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 3406521 is about 1845.6762988130. The cubic root of 3406521 is about 150.4655314860.

The spelling of 3406521 in words is "three million, four hundred six thousand, five hundred twenty-one".