135593261 has 4 divisors (see below), whose sum is σ = 138478272. Its totient is φ = 132708252.

The previous prime is 135593251. The next prime is 135593279. The reversal of 135593261 is 162395531.

135593261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 162395531 = 71 ⋅2287261.

It is a cyclic number.

It is not a de Polignac number, because 135593261 - 2¹⁸ = 135331117 is a prime.

It is a super-2 number, since 2×135593261² = 36771064857228242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135593221) 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, 1442435 + ... + 1442528.

It is an arithmetic number, because the mean of its divisors is an integer number (34619568).

Almost surely, 2^135593261 is an apocalyptic number.

It is an amenable number.

135593261 is a deficient number, since it is larger than the sum of its proper divisors (2885011).

135593261 is an equidigital number, since it uses as much as digits as its factorization.

135593261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885010.

The product of its digits is 24300, while the sum is 35.

The square root of 135593261 is about 11644.4519407313. The cubic root of 135593261 is about 513.7431392852.

The spelling of 135593261 in words is "one hundred thirty-five million, five hundred ninety-three thousand, two hundred sixty-one".