124999949 has 4 divisors (see below), whose sum is σ = 128378364. Its totient is φ = 121621536.

The previous prime is 124999943. The next prime is 124999961. The reversal of 124999949 is 949999421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55026724 + 69973225 = 7418^2 + 8365^2 .

It is a cyclic number.

It is not a de Polignac number, because 124999949 - 2⁴ = 124999933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124999894 and 124999903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124999943) 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, 1689152 + ... + 1689225.

It is an arithmetic number, because the mean of its divisors is an integer number (32094591).

Almost surely, 2^124999949 is an apocalyptic number.

It is an amenable number.

124999949 is a deficient number, since it is larger than the sum of its proper divisors (3378415).

124999949 is an equidigital number, since it uses as much as digits as its factorization.

124999949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378414.

The product of its digits is 1889568, while the sum is 56.

The square root of 124999949 is about 11180.3376067094. The cubic root of 124999949 is about 499.9999320000. Note that the first 4 decimals are identical.

The spelling of 124999949 in words is "one hundred twenty-four million, nine hundred ninety-nine thousand, nine hundred forty-nine".