124999243 has 2 divisors, whose sum is σ = 124999244. Its totient is φ = 124999242.

The previous prime is 124999241. The next prime is 124999253. The reversal of 124999243 is 342999421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 124999243 - 2¹ = 124999241 is a prime.

Together with 124999241, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 124999243.

It is not a weakly prime, because it can be changed into another prime (124999241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62499621 + 62499622.

It is an arithmetic number, because the mean of its divisors is an integer number (62499622).

Almost surely, 2^124999243 is an apocalyptic number.

124999243 is a deficient number, since it is larger than the sum of its proper divisors (1).

124999243 is an equidigital number, since it uses as much as digits as its factorization.

124999243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 124999243 is about 11180.3060333785. The cubic root of 124999243 is about 499.9989906646.

The spelling of 124999243 in words is "one hundred twenty-four million, nine hundred ninety-nine thousand, two hundred forty-three".