3659921 has 8 divisors (see below), whose sum is σ = 3841344. Its totient is φ = 3480400.

The previous prime is 3659917. The next prime is 3659923. The reversal of 3659921 is 1299563.

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 3659921 - 2² = 3659917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3659923) 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, 4871 + ... + 5571.

It is an arithmetic number, because the mean of its divisors is an integer number (480168).

Almost surely, 2^3659921 is an apocalyptic number.

It is an amenable number.

3659921 is a deficient number, since it is larger than the sum of its proper divisors (181423).

3659921 is a wasteful number, since it uses less digits than its factorization.

3659921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951.

The product of its digits is 14580, while the sum is 35.

The square root of 3659921 is about 1913.0919998787. The cubic root of 3659921 is about 154.1075456125.

The spelling of 3659921 in words is "three million, six hundred fifty-nine thousand, nine hundred twenty-one".