135620025 has 24 divisors (see below), whose sum is σ = 224640384. Its totient is φ = 72196800.

The previous prime is 135620021. The next prime is 135620027. The reversal of 135620025 is 520026531.

It is not a de Polignac number, because 135620025 - 2² = 135620021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135619977 and 135620004.

It is not an unprimeable number, because it can be changed into a prime (135620021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49440 + ... + 52110.

It is an arithmetic number, because the mean of its divisors is an integer number (9360016).

Almost surely, 2^135620025 is an apocalyptic number.

135620025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135620025 is a deficient number, since it is larger than the sum of its proper divisors (89020359).

135620025 is a wasteful number, since it uses less digits than its factorization.

135620025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361 (or 3356 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 135620025 is about 11645.6011008449. The cubic root of 135620025 is about 513.7769386955.

Adding to 135620025 its reverse (520026531), we get a palindrome (655646556).

The spelling of 135620025 in words is "one hundred thirty-five million, six hundred twenty thousand, twenty-five".