3656121 has 8 divisors (see below), whose sum is σ = 5571264. Its totient is φ = 2089200.

The previous prime is 3656111. The next prime is 3656129. The reversal of 3656121 is 1216563.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3656121 - 2⁵ = 3656089 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3656091 and 3656100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656129) 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, 87030 + ... + 87071.

It is an arithmetic number, because the mean of its divisors is an integer number (696408).

Almost surely, 2^3656121 is an apocalyptic number.

It is an amenable number.

3656121 is a deficient number, since it is larger than the sum of its proper divisors (1915143).

3656121 is a wasteful number, since it uses less digits than its factorization.

3656121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174111.

The product of its digits is 1080, while the sum is 24.

The square root of 3656121 is about 1912.0985853245. The cubic root of 3656121 is about 154.0541918685.

The spelling of 3656121 in words is "three million, six hundred fifty-six thousand, one hundred twenty-one".