3521309 has 4 divisors (see below), whose sum is σ = 3841440. Its totient is φ = 3201180.

The previous prime is 3521303. The next prime is 3521341. The reversal of 3521309 is 9031253.

It is a happy number.

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 3521309 - 2⁴ = 3521293 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 (3521303) 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, 160049 + ... + 160070.

It is an arithmetic number, because the mean of its divisors is an integer number (960360).

Almost surely, 2^3521309 is an apocalyptic number.

It is an amenable number.

3521309 is a deficient number, since it is larger than the sum of its proper divisors (320131).

3521309 is a wasteful number, since it uses less digits than its factorization.

3521309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320130.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 3521309 is about 1876.5151211754. The cubic root of 3521309 is about 152.1369523995.

It can be divided in two parts, 352 and 1309, that added together give a palindrome (1661).

The spelling of 3521309 in words is "three million, five hundred twenty-one thousand, three hundred nine".