123187492 has 6 divisors (see below), whose sum is σ = 215578118. Its totient is φ = 61593744.

The previous prime is 123187489. The next prime is 123187501. The reversal of 123187492 is 294781321.

It can be written as a sum of positive squares in only one way, i.e., 116510436 + 6677056 = 10794^2 + 2584^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15398433 + ... + 15398440.

Almost surely, 2^123187492 is an apocalyptic number.

It is an amenable number.

123187492 is a deficient number, since it is larger than the sum of its proper divisors (92390626).

123187492 is a wasteful number, since it uses less digits than its factorization.

123187492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30796877 (or 30796875 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 123187492 is about 11098.9860798183. The cubic root of 123187492 is about 497.5715469940.

The spelling of 123187492 in words is "one hundred twenty-three million, one hundred eighty-seven thousand, four hundred ninety-two".