124240561 has 8 divisors (see below), whose sum is σ = 128137064. Its totient is φ = 120372480.

The previous prime is 124240541. The next prime is 124240577. The reversal of 124240561 is 165042421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 100620961 + 23619600 = 10031^2 + 4860^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124240561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124240541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1951 + ... + 15883.

It is an arithmetic number, because the mean of its divisors is an integer number (16017133).

Almost surely, 2^124240561 is an apocalyptic number.

It is an amenable number.

124240561 is a deficient number, since it is larger than the sum of its proper divisors (3896503).

124240561 is a wasteful number, since it uses less digits than its factorization.

124240561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14211.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 124240561 is about 11146.3249997477. The cubic root of 124240561 is about 498.9853570588.

Adding to 124240561 its reverse (165042421), we get a palindrome (289282982).

The spelling of 124240561 in words is "one hundred twenty-four million, two hundred forty thousand, five hundred sixty-one".