124999947 has 12 divisors (see below), whose sum is σ = 186781920. Its totient is φ = 80459568.

The previous prime is 124999943. The next prime is 124999961. The reversal of 124999947 is 749999421.

It is not a de Polignac number, because 124999947 - 2² = 124999943 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 124999893 and 124999902.

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 11 ways as a sum of consecutive naturals, for example, 239203 + ... + 239724.

It is an arithmetic number, because the mean of its divisors is an integer number (15565160).

Almost surely, 2^124999947 is an apocalyptic number.

124999947 is a deficient number, since it is larger than the sum of its proper divisors (61781973).

124999947 is a wasteful number, since it uses less digits than its factorization.

124999947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478962 (or 478959 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 124999947 is about 11180.3375172666. The cubic root of 124999947 is about 499.9999293333. Note that the first 4 decimals are identical.

The spelling of 124999947 in words is "one hundred twenty-four million, nine hundred ninety-nine thousand, nine hundred forty-seven".