124115561 has 8 divisors (see below), whose sum is σ = 125520384. Its totient is φ = 122718240.

The previous prime is 124115539. The next prime is 124115611. The reversal of 124115561 is 165511421.

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

It is a cyclic number.

It is not a de Polignac number, because 124115561 - 2¹⁰ = 124114537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124115561.

It is not an unprimeable number, because it can be changed into a prime (124115531) 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, 35456 + ... + 38798.

It is an arithmetic number, because the mean of its divisors is an integer number (15690048).

Almost surely, 2^124115561 is an apocalyptic number.

It is an amenable number.

124115561 is a deficient number, since it is larger than the sum of its proper divisors (1404823).

124115561 is a wasteful number, since it uses less digits than its factorization.

124115561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751.

The product of its digits is 1200, while the sum is 26.

The square root of 124115561 is about 11140.7163593729. The cubic root of 124115561 is about 498.8179557449.

Adding to 124115561 its reverse (165511421), we get a palindrome (289626982).

The spelling of 124115561 in words is "one hundred twenty-four million, one hundred fifteen thousand, five hundred sixty-one".