135426731 has 16 divisors (see below), whose sum is σ = 151901568. Its totient is φ = 119668800.

The previous prime is 135426719. The next prime is 135426751. The reversal of 135426731 is 137624531.

It is a cyclic number.

It is not a de Polignac number, because 135426731 - 2⁶ = 135426667 is a prime.

It is a super-2 number, since 2×135426731² = 36680798938692722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135426751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210296 + ... + 210938.

It is an arithmetic number, because the mean of its divisors is an integer number (9493848).

Almost surely, 2^135426731 is an apocalyptic number.

135426731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135426731 is a deficient number, since it is larger than the sum of its proper divisors (16474837).

135426731 is a wasteful number, since it uses less digits than its factorization.

135426731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162.

The product of its digits is 15120, while the sum is 32.

The square root of 135426731 is about 11637.2991282342. The cubic root of 135426731 is about 513.5327338104.

The spelling of 135426731 in words is "one hundred thirty-five million, four hundred twenty-six thousand, seven hundred thirty-one".