135861143 has 16 divisors (see below), whose sum is σ = 154720800. Its totient is φ = 118164480.

The previous prime is 135861137. The next prime is 135861181. The reversal of 135861143 is 341168531.

It is a cyclic number.

It is not a de Polignac number, because 135861143 - 2⁶ = 135861079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135861643) 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, 34163 + ... + 37931.

It is an arithmetic number, because the mean of its divisors is an integer number (9670050).

Almost surely, 2^135861143 is an apocalyptic number.

135861143 is a deficient number, since it is larger than the sum of its proper divisors (18859657).

135861143 is a wasteful number, since it uses less digits than its factorization.

135861143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3922.

The product of its digits is 8640, while the sum is 32.

The square root of 135861143 is about 11655.9488245273. The cubic root of 135861143 is about 514.0812387050.

The spelling of 135861143 in words is "one hundred thirty-five million, eight hundred sixty-one thousand, one hundred forty-three".