3639121 has 8 divisors (see below), whose sum is σ = 3801600. Its totient is φ = 3479520.

The previous prime is 3639109. The next prime is 3639143. The reversal of 3639121 is 1219363.

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 3639121 - 2⁷ = 3638993 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 (3639151) 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, 2100 + ... + 3418.

It is an arithmetic number, because the mean of its divisors is an integer number (475200).

Almost surely, 2^3639121 is an apocalyptic number.

3639121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3639121 is a deficient number, since it is larger than the sum of its proper divisors (162479).

3639121 is a wasteful number, since it uses less digits than its factorization.

3639121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439.

The product of its digits is 972, while the sum is 25.

The square root of 3639121 is about 1907.6480283323. The cubic root of 3639121 is about 153.8150503596.

The spelling of 3639121 in words is "three million, six hundred thirty-nine thousand, one hundred twenty-one".