3656129 has 2 divisors, whose sum is σ = 3656130. Its totient is φ = 3656128.

The previous prime is 3656111. The next prime is 3656137. The reversal of 3656129 is 9216563.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3055504 + 600625 = 1748^2 + 775^2 .

It is a cyclic number.

It is not a de Polignac number, because 3656129 - 2¹⁶ = 3590593 is a prime.

It is a Chen prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 3656095 and 3656104.

It is not a weakly prime, because it can be changed into another prime (3656179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1828064 + 1828065.

It is an arithmetic number, because the mean of its divisors is an integer number (1828065).

Almost surely, 2^3656129 is an apocalyptic number.

It is an amenable number.

3656129 is a deficient number, since it is larger than the sum of its proper divisors (1).

3656129 is an equidigital number, since it uses as much as digits as its factorization.

3656129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 32.

The square root of 3656129 is about 1912.1006772657. The cubic root of 3656129 is about 154.0543042310.

It can be divided in two parts, 36 and 56129, that added together give a palindrome (56165).

The spelling of 3656129 in words is "three million, six hundred fifty-six thousand, one hundred twenty-nine".