135156123 has 12 divisors (see below), whose sum is σ = 197697760. Its totient is φ = 88963056.

The previous prime is 135156107. The next prime is 135156127. The reversal of 135156123 is 321651531.

135156123 is a `hidden beast` number, since 1 + 35 + 15 + 612 + 3 = 666.

It is not a de Polignac number, because 135156123 - 2⁴ = 135156107 is a prime.

It is a super-2 number, since 2×135156123² = 36534355168782258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135156127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94336 + ... + 95757.

Almost surely, 2^135156123 is an apocalyptic number.

135156123 is a deficient number, since it is larger than the sum of its proper divisors (62541637).

135156123 is a wasteful number, since it uses less digits than its factorization.

135156123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190178 (or 190175 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 135156123 is about 11625.6665615353. Note that the first 3 decimals coincide. The cubic root of 135156123 is about 513.1904608387.

The spelling of 135156123 in words is "one hundred thirty-five million, one hundred fifty-six thousand, one hundred twenty-three".