3656501 has 4 divisors (see below), whose sum is σ = 3666432. Its totient is φ = 3646572.

The previous prime is 3656491. The next prime is 3656509. The reversal of 3656501 is 1056563.

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 3656501 - 2⁶ = 3656437 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656509) 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, 4391 + ... + 5156.

It is an arithmetic number, because the mean of its divisors is an integer number (916608).

Almost surely, 2^3656501 is an apocalyptic number.

It is an amenable number.

3656501 is a deficient number, since it is larger than the sum of its proper divisors (9931).

3656501 is an equidigital number, since it uses as much as digits as its factorization.

3656501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9930.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 3656501 is about 1912.1979500041. The cubic root of 3656501 is about 154.0595289060.

The spelling of 3656501 in words is "three million, six hundred fifty-six thousand, five hundred one".