124991243 has 8 divisors (see below), whose sum is σ = 134832768. Its totient is φ = 115182144.

The previous prime is 124991233. The next prime is 124991249. The reversal of 124991243 is 342199421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124991243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124991249) 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, 230 + ... + 15812.

It is an arithmetic number, because the mean of its divisors is an integer number (16854096).

Almost surely, 2^124991243 is an apocalyptic number.

124991243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

124991243 is a deficient number, since it is larger than the sum of its proper divisors (9841525).

124991243 is a wasteful number, since it uses less digits than its factorization.

124991243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16213.

The product of its digits is 15552, while the sum is 35.

The square root of 124991243 is about 11179.9482556942. The cubic root of 124991243 is about 499.9883237273.

The spelling of 124991243 in words is "one hundred twenty-four million, nine hundred ninety-one thousand, two hundred forty-three".