123561252 has 18 divisors (see below), whose sum is σ = 312335478. Its totient is φ = 41187072.

The previous prime is 123561247. The next prime is 123561329. The reversal of 123561252 is 252165321.

It is a happy number.

123561252 is a `hidden beast` number, since 12 + 35 + 612 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 123076836 + 484416 = 11094^2 + 696^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1716093 + ... + 1716164.

It is an arithmetic number, because the mean of its divisors is an integer number (17351971).

Almost surely, 2^123561252 is an apocalyptic number.

123561252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123561252 is an abundant number, since it is smaller than the sum of its proper divisors (188774226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123561252 is a wasteful number, since it uses less digits than its factorization.

123561252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3432267 (or 3432262 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 123561252 is about 11115.8109015942. The cubic root of 123561252 is about 498.0742619211.

The spelling of 123561252 in words is "one hundred twenty-three million, five hundred sixty-one thousand, two hundred fifty-two".