135771025 has 24 divisors (see below), whose sum is σ = 182097720. Its totient is φ = 99824640.

The previous prime is 135771007. The next prime is 135771043. The reversal of 135771025 is 520177531.

It is an interprime number because it is at equal distance from previous prime (135771007) and next prime (135771043).

It can be written as a sum of positive squares in 12 ways, for example, as 120033936 + 15737089 = 10956^2 + 3967^2 .

It is not a de Polignac number, because 135771025 - 2⁹ = 135770513 is a prime.

It is an unprimeable number.

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, 86649 + ... + 88201.

It is an arithmetic number, because the mean of its divisors is an integer number (7587405).

Almost surely, 2^135771025 is an apocalyptic number.

It is an amenable number.

135771025 is a deficient number, since it is larger than the sum of its proper divisors (46326695).

135771025 is a wasteful number, since it uses less digits than its factorization.

135771025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845 (or 1840 counting only the distinct ones).

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 135771025 is about 11652.0824319089. The cubic root of 135771025 is about 513.9675485576.

The spelling of 135771025 in words is "one hundred thirty-five million, seven hundred seventy-one thousand, twenty-five".