135142731 has 12 divisors (see below), whose sum is σ = 195357240. Its totient is φ = 90025440.

The previous prime is 135142703. The next prime is 135142769. The reversal of 135142731 is 137241531.

It is not a de Polignac number, because 135142731 - 2⁷ = 135142603 is a prime.

It is a super-2 number, since 2×135142731² = 36527115484276722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135142695 and 135142704.

It is not an unprimeable number, because it can be changed into a prime (135142771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8260 + ... + 18398.

It is an arithmetic number, because the mean of its divisors is an integer number (16279770).

Almost surely, 2^135142731 is an apocalyptic number.

135142731 is a deficient number, since it is larger than the sum of its proper divisors (60214509).

135142731 is a wasteful number, since it uses less digits than its factorization.

135142731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11626 (or 11623 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 135142731 is about 11625.0905802923. The cubic root of 135142731 is about 513.1735103829.

The spelling of 135142731 in words is "one hundred thirty-five million, one hundred forty-two thousand, seven hundred thirty-one".