135143657 has 8 divisors (see below), whose sum is σ = 147813120. Its totient is φ = 122538160.

The previous prime is 135143651. The next prime is 135143777. The reversal of 135143657 is 756341531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135143657 - 2²⁰ = 134095081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135143651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11513 + ... + 20070.

It is an arithmetic number, because the mean of its divisors is an integer number (18476640).

Almost surely, 2^135143657 is an apocalyptic number.

It is an amenable number.

135143657 is a deficient number, since it is larger than the sum of its proper divisors (12669463).

135143657 is a wasteful number, since it uses less digits than its factorization.

135143657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31983.

The product of its digits is 37800, while the sum is 35.

The square root of 135143657 is about 11625.1304078707. The cubic root of 135143657 is about 513.1746824711.

It can be divided in two parts, 13514 and 3657, that added together give a palindrome (17171).

The spelling of 135143657 in words is "one hundred thirty-five million, one hundred forty-three thousand, six hundred fifty-seven".