124918861 has 4 divisors (see below), whose sum is σ = 124982812. Its totient is φ = 124854912.

The previous prime is 124918853. The next prime is 124918943. The reversal of 124918861 is 168819421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82264900 + 42653961 = 9070^2 + 6531^2 .

It is a cyclic number.

It is not a de Polignac number, because 124918861 - 2³ = 124918853 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 (124918061) 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, 28950 + ... + 32983.

It is an arithmetic number, because the mean of its divisors is an integer number (31245703).

Almost surely, 2^124918861 is an apocalyptic number.

It is an amenable number.

124918861 is a deficient number, since it is larger than the sum of its proper divisors (63951).

124918861 is an equidigital number, since it uses as much as digits as its factorization.

124918861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63950.

The product of its digits is 27648, while the sum is 40.

The square root of 124918861 is about 11176.7106520657. The cubic root of 124918861 is about 499.8917912501.

The spelling of 124918861 in words is "one hundred twenty-four million, nine hundred eighteen thousand, eight hundred sixty-one".