124864609 has 4 divisors (see below), whose sum is σ = 132209604. Its totient is φ = 117519616.

The previous prime is 124864601. The next prime is 124864627. The reversal of 124864609 is 906468421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906468421 = 6551 ⋅138371.

It can be written as a sum of positive squares in 2 ways, for example, as 68013009 + 56851600 = 8247^2 + 7540^2 .

It is a cyclic number.

It is not a de Polignac number, because 124864609 - 2³ = 124864601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124864601) 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, 3672472 + ... + 3672505.

It is an arithmetic number, because the mean of its divisors is an integer number (33052401).

Almost surely, 2^124864609 is an apocalyptic number.

It is an amenable number.

124864609 is a deficient number, since it is larger than the sum of its proper divisors (7344995).

124864609 is an equidigital number, since it uses as much as digits as its factorization.

124864609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7344994.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 124864609 is about 11174.2833774699. The cubic root of 124864609 is about 499.8194134515.

The spelling of 124864609 in words is "one hundred twenty-four million, eight hundred sixty-four thousand, six hundred nine".