136402025 has 6 divisors (see below), whose sum is σ = 169138542. Its totient is φ = 109121600.

The previous prime is 136402009. The next prime is 136402027. The reversal of 136402025 is 520204631.

It can be written as a sum of positive squares in 3 ways, for example, as 4129024 + 132273001 = 2032^2 + 11501^2 .

It is not a de Polignac number, because 136402025 - 2⁴ = 136402009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136402027) 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, 2728016 + ... + 2728065.

It is an arithmetic number, because the mean of its divisors is an integer number (28189757).

Almost surely, 2^136402025 is an apocalyptic number.

It is an amenable number.

136402025 is a deficient number, since it is larger than the sum of its proper divisors (32736517).

136402025 is an equidigital number, since it uses as much as digits as its factorization.

136402025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5456091 (or 5456086 counting only the distinct ones).

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

The square root of 136402025 is about 11679.1277499649. The cubic root of 136402025 is about 514.7625448816.

Adding to 136402025 its reverse (520204631), we get a palindrome (656606656).

The spelling of 136402025 in words is "one hundred thirty-six million, four hundred two thousand, twenty-five".