124641561 has 16 divisors (see below), whose sum is σ = 181649088. Its totient is φ = 75393600.

The previous prime is 124641553. The next prime is 124641581. The reversal of 124641561 is 165146421.

It is not a de Polignac number, because 124641561 - 2³ = 124641553 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (124641521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14991 + ... + 21771.

It is an arithmetic number, because the mean of its divisors is an integer number (11353068).

Almost surely, 2^124641561 is an apocalyptic number.

124641561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

124641561 is a deficient number, since it is larger than the sum of its proper divisors (57007527).

124641561 is a wasteful number, since it uses less digits than its factorization.

124641561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7352.

The product of its digits is 5760, while the sum is 30.

The square root of 124641561 is about 11164.2985001298. The cubic root of 124641561 is about 499.5216237917.

Adding to 124641561 its reverse (165146421), we get a palindrome (289787982).

The spelling of 124641561 in words is "one hundred twenty-four million, six hundred forty-one thousand, five hundred sixty-one".