3686121 has 8 divisors (see below), whose sum is σ = 5460960. Its totient is φ = 2457396.

The previous prime is 3686119. The next prime is 3686131. The reversal of 3686121 is 1216863.

It is not a de Polignac number, because 3686121 - 2¹ = 3686119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 136523 = 3686121 / (3 + 6 + 8 + 6 + 1 + 2 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3686101) 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, 68235 + ... + 68288.

It is an arithmetic number, because the mean of its divisors is an integer number (682620).

Almost surely, 2^3686121 is an apocalyptic number.

It is an amenable number.

3686121 is a deficient number, since it is larger than the sum of its proper divisors (1774839).

3686121 is a wasteful number, since it uses less digits than its factorization.

3686121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136532 (or 136526 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 3686121 is about 1919.9273423752. The cubic root of 3686121 is about 154.4744042809.

The spelling of 3686121 in words is "three million, six hundred eighty-six thousand, one hundred twenty-one".