12635189 has 6 divisors (see below), whose sum is σ = 14698134. Its totient is φ = 10830120.

The previous prime is 12635159. The next prime is 12635219. The reversal of 12635189 is 98153621.

It is an interprime number because it is at equal distance from previous prime (12635159) and next prime (12635219).

It can be written as a sum of positive squares in only one way, i.e., 8076964 + 4558225 = 2842^2 + 2135^2 .

It is not a de Polignac number, because 12635189 - 2⁸ = 12634933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12635159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128882 + ... + 128979.

It is an arithmetic number, because the mean of its divisors is an integer number (2449689).

Almost surely, 2^12635189 is an apocalyptic number.

It is an amenable number.

12635189 is a deficient number, since it is larger than the sum of its proper divisors (2062945).

12635189 is an equidigital number, since it uses as much as digits as its factorization.

12635189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257875 (or 257868 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 12635189 is about 3554.6011027962. The cubic root of 12635189 is about 232.9130991667.

The spelling of 12635189 in words is "twelve million, six hundred thirty-five thousand, one hundred eighty-nine".