136102257 has 12 divisors (see below), whose sum is σ = 197453620. Its totient is φ = 90337248.

The previous prime is 136102223. The next prime is 136102261. The reversal of 136102257 is 752201631.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 125350416 + 10751841 = 11196^2 + 3279^2 .

It is not a de Polignac number, because 136102257 - 2⁶ = 136102193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136102257.

It is not an unprimeable number, because it can be changed into a prime (136102457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30958 + ... + 35079.

Almost surely, 2^136102257 is an apocalyptic number.

It is an amenable number.

136102257 is a deficient number, since it is larger than the sum of its proper divisors (61351363).

136102257 is a wasteful number, since it uses less digits than its factorization.

136102257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66272 (or 66269 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 136102257 is about 11666.2871985906. The cubic root of 136102257 is about 514.3851738525.

Adding to 136102257 its reverse (752201631), we get a palindrome (888303888).

The spelling of 136102257 in words is "one hundred thirty-six million, one hundred two thousand, two hundred fifty-seven".