124105247 has 4 divisors (see below), whose sum is σ = 141834576.
Its totient is φ = 106375920.
The previous prime is 124105243. The next prime is 124105271. The reversal of 124105247 is 742501421.
It is a semiprime because it is the product of two primes.
It is not a de Polignac number, because 124105247 - 22 = 124105243 is a prime.
It is a super-2 number, since 2×1241052472 = 30804224665862018, which contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (124105243) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8864654 + ... + 8864667.
It is an arithmetic number, because the mean of its divisors is an integer number (35458644).
Almost surely, 2124105247 is an apocalyptic number.
124105247 is a deficient number, since it is larger than the sum of its proper divisors (17729329).
124105247 is an equidigital number, since it uses as much as digits as its factorization.
124105247 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 17729328.
The product of its (nonzero) digits is 2240, while the sum is 26.
The square root of 124105247 is about 11140.2534531311.
The cubic root of 124105247 is about 498.8041381089.
Adding to 124105247 its reverse (742501421), we get a palindrome (866606668).
The spelling of 124105247 in words is "one hundred twenty-four million, one hundred five thousand, two hundred forty-seven".