3521491 has 4 divisors (see below), whose sum is σ = 3527800. Its totient is φ = 3515184.

The previous prime is 3521489. The next prime is 3521513. The reversal of 3521491 is 1941253.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3521491 - 2¹ = 3521489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3521191) 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, 2226 + ... + 3463.

It is an arithmetic number, because the mean of its divisors is an integer number (881950).

Almost surely, 2^3521491 is an apocalyptic number.

3521491 is a deficient number, since it is larger than the sum of its proper divisors (6309).

3521491 is an equidigital number, since it uses as much as digits as its factorization.

3521491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6308.

The product of its digits is 1080, while the sum is 25.

The square root of 3521491 is about 1876.5636146958. The cubic root of 3521491 is about 152.1395734369.

The spelling of 3521491 in words is "three million, five hundred twenty-one thousand, four hundred ninety-one".