135015761 has 4 divisors (see below), whose sum is σ = 135875892. Its totient is φ = 134155632.

The previous prime is 135015739. The next prime is 135015781. The reversal of 135015761 is 167510531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 167510531 = 683 ⋅245257.

It can be written as a sum of positive squares in 2 ways, for example, as 12780625 + 122235136 = 3575^2 + 11056^2 .

It is a cyclic number.

It is not a de Polignac number, because 135015761 - 2⁶ = 135015697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135015781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429830 + ... + 430143.

It is an arithmetic number, because the mean of its divisors is an integer number (33968973).

Almost surely, 2^135015761 is an apocalyptic number.

It is an amenable number.

135015761 is a deficient number, since it is larger than the sum of its proper divisors (860131).

135015761 is an equidigital number, since it uses as much as digits as its factorization.

135015761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860130.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 135015761 is about 11619.6282642776. The cubic root of 135015761 is about 513.0127468787.

The spelling of 135015761 in words is "one hundred thirty-five million, fifteen thousand, seven hundred sixty-one".