135272591 has 4 divisors (see below), whose sum is σ = 141154032. Its totient is φ = 129391152.

The previous prime is 135272513. The next prime is 135272593. The reversal of 135272591 is 195272531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135272591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135272593) 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, 2940686 + ... + 2940731.

It is an arithmetic number, because the mean of its divisors is an integer number (35288508).

Almost surely, 2^135272591 is an apocalyptic number.

135272591 is a deficient number, since it is larger than the sum of its proper divisors (5881441).

135272591 is an equidigital number, since it uses as much as digits as its factorization.

135272591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5881440.

The product of its digits is 18900, while the sum is 35.

The square root of 135272591 is about 11630.6745720100. The cubic root of 135272591 is about 513.3378289462.

The spelling of 135272591 in words is "one hundred thirty-five million, two hundred seventy-two thousand, five hundred ninety-one".