135839025 has 135 divisors (see below), whose sum is σ = 300826449. Its totient is φ = 60419520.

The previous prime is 135839023. The next prime is 135839029. The reversal of 135839025 is 520938531.

The square root of 135839025 is 11655.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 12895281 + 122943744 = 3591^2 + 11088^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is not a de Polignac number, because 135839025 - 2¹ = 135839023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135839023) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 3671307 + ... + 3671343.

Almost surely, 2^135839025 is an apocalyptic number.

135839025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135839025 is the 11655-th square number.

135839025 is the 5828-th centered octagonal number.

It is an amenable number.

135839025 is an abundant number, since it is smaller than the sum of its proper divisors (164987424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135839025 is an equidigital number, since it uses as much as digits as its factorization.

135839025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The cubic root of 135839025 is about 514.0533399605.

Multiplying 135839025 by its sum of digits (36), we get a square (4890204900 = 69930²).

Multiplying 135839025 by its product of nonzero digits (32400), we get a square (4401184410000 = 2097900²).

It can be divided in two parts, 135 and 839025, that added together give a triangular number (839160 = T₁₂₉₅).

The spelling of 135839025 in words is "one hundred thirty-five million, eight hundred thirty-nine thousand, twenty-five".