124806749 has 4 divisors (see below), whose sum is σ = 129110460. Its totient is φ = 120503040.

The previous prime is 124806739. The next prime is 124806751. The reversal of 124806749 is 947608421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 947608421 = 3739 ⋅253439.

It can be written as a sum of positive squares in 2 ways, for example, as 94225849 + 30580900 = 9707^2 + 5530^2 .

It is a cyclic number.

It is not a de Polignac number, because 124806749 - 2²⁴ = 108029533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124806739) 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, 2151812 + ... + 2151869.

It is an arithmetic number, because the mean of its divisors is an integer number (32277615).

Almost surely, 2^124806749 is an apocalyptic number.

It is an amenable number.

124806749 is a deficient number, since it is larger than the sum of its proper divisors (4303711).

124806749 is an equidigital number, since it uses as much as digits as its factorization.

124806749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4303710.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 124806749 is about 11171.6940971367. The cubic root of 124806749 is about 499.7421991002.

The spelling of 124806749 in words is "one hundred twenty-four million, eight hundred six thousand, seven hundred forty-nine".