123155253 has 12 divisors (see below), whose sum is σ = 191575020. Its totient is φ = 75787776.

The previous prime is 123155213. The next prime is 123155261. The reversal of 123155253 is 352551321.

It is a happy number.

123155253 is a `hidden beast` number, since 123 + 15 + 525 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39652209 + 83503044 = 6297^2 + 9138^2 .

It is not a de Polignac number, because 123155253 - 2⁶ = 123155189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123155213) 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, 526188 + ... + 526421.

It is an arithmetic number, because the mean of its divisors is an integer number (15964585).

Almost surely, 2^123155253 is an apocalyptic number.

123155253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

123155253 is a deficient number, since it is larger than the sum of its proper divisors (68419767).

123155253 is a wasteful number, since it uses less digits than its factorization.

123155253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052628 (or 1052625 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 123155253 is about 11097.5336449141. The cubic root of 123155253 is about 497.5281372603.

The spelling of 123155253 in words is "one hundred twenty-three million, one hundred fifty-five thousand, two hundred fifty-three".