135700257 has 24 divisors (see below), whose sum is σ = 229610592. Its totient is φ = 70492800.

The previous prime is 135700247. The next prime is 135700277. The reversal of 135700257 is 752007531.

It is not a de Polignac number, because 135700257 - 2⁷ = 135700129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135700247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40344 + ... + 43577.

It is an arithmetic number, because the mean of its divisors is an integer number (9567108).

Almost surely, 2^135700257 is an apocalyptic number.

It is an amenable number.

135700257 is a deficient number, since it is larger than the sum of its proper divisors (93910335).

135700257 is a wasteful number, since it uses less digits than its factorization.

135700257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83949 (or 83942 counting only the distinct ones).

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 135700257 is about 11649.0453256909. The cubic root of 135700257 is about 513.8782345163.

Adding to 135700257 its reverse (752007531), we get a palindrome (887707788).

The spelling of 135700257 in words is "one hundred thirty-five million, seven hundred thousand, two hundred fifty-seven".