124947647 has 4 divisors (see below), whose sum is σ = 136306536. Its totient is φ = 113588760.

The previous prime is 124947617. The next prime is 124947649. The reversal of 124947647 is 746749421.

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

It is a cyclic number.

It is not a de Polignac number, because 124947647 - 2¹² = 124943551 is a prime.

It is a super-2 number, since 2×124947647² = 31223828981673218, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124947598 and 124947607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124947649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5679428 + ... + 5679449.

It is an arithmetic number, because the mean of its divisors is an integer number (34076634).

Almost surely, 2^124947647 is an apocalyptic number.

124947647 is a deficient number, since it is larger than the sum of its proper divisors (11358889).

124947647 is a wasteful number, since it uses less digits than its factorization.

124947647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11358888.

The product of its digits is 338688, while the sum is 44.

The square root of 124947647 is about 11177.9983449632. The cubic root of 124947647 is about 499.9301862525.

The spelling of 124947647 in words is "one hundred twenty-four million, nine hundred forty-seven thousand, six hundred forty-seven".