136400225 has 12 divisors (see below), whose sum is σ = 182147196. Its totient is φ = 100726080.

The previous prime is 136400203. The next prime is 136400237. The reversal of 136400225 is 522004631.

It can be written as a sum of positive squares in 6 ways, for example, as 2211169 + 134189056 = 1487^2 + 11584^2 .

It is not a de Polignac number, because 136400225 - 2⁶ = 136400161 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 136400225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209522 + ... + 210171.

It is an arithmetic number, because the mean of its divisors is an integer number (15178933).

Almost surely, 2^136400225 is an apocalyptic number.

It is an amenable number.

136400225 is a deficient number, since it is larger than the sum of its proper divisors (45746971).

136400225 is a wasteful number, since it uses less digits than its factorization.

136400225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419716 (or 419711 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 136400225 is about 11679.0506891613. The cubic root of 136400225 is about 514.7602805539.

Adding to 136400225 its reverse (522004631), we get a palindrome (658404856).

The spelling of 136400225 in words is "one hundred thirty-six million, four hundred thousand, two hundred twenty-five".