3656131 has 4 divisors (see below), whose sum is σ = 3678192. Its totient is φ = 3634072.

The previous prime is 3656129. The next prime is 3656137. The reversal of 3656131 is 1316563.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3656131 - 2¹ = 3656129 is a prime.

It is a super-2 number, since 2×3656131² = 26734587778322, which contains 22 as substring.

It is a Duffinian number.

3656131 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3656096 and 3656105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656137) 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 3 ways as a sum of consecutive naturals, for example, 10780 + ... + 11113.

It is an arithmetic number, because the mean of its divisors is an integer number (919548).

Almost surely, 2^3656131 is an apocalyptic number.

3656131 is a deficient number, since it is larger than the sum of its proper divisors (22061).

3656131 is a wasteful number, since it uses less digits than its factorization.

3656131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22060.

The product of its digits is 1620, while the sum is 25.

The square root of 3656131 is about 1912.1012002507. The cubic root of 3656131 is about 154.0543323216.

The spelling of 3656131 in words is "three million, six hundred fifty-six thousand, one hundred thirty-one".