123249971 has 8 divisors (see below), whose sum is σ = 137308080. Its totient is φ = 109845792.

The previous prime is 123249967. The next prime is 123249991. The reversal of 123249971 is 179942321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123249971 - 2² = 123249967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123249901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163085 + ... + 163838.

It is an arithmetic number, because the mean of its divisors is an integer number (17163510).

Almost surely, 2^123249971 is an apocalyptic number.

123249971 is a deficient number, since it is larger than the sum of its proper divisors (14058109).

123249971 is a wasteful number, since it uses less digits than its factorization.

123249971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326965.

The product of its digits is 27216, while the sum is 38.

The square root of 123249971 is about 11101.8003494929. The cubic root of 123249971 is about 497.6556532559.

The spelling of 123249971 in words is "one hundred twenty-three million, two hundred forty-nine thousand, nine hundred seventy-one".