124416721 has 8 divisors (see below), whose sum is σ = 146168064. Its totient is φ = 104405520.

The previous prime is 124416713. The next prime is 124416767. The reversal of 124416721 is 127614421.

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 124416721 - 2³ = 124416713 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 124416721.

It is not an unprimeable number, because it can be changed into a prime (124416221) 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, 434881 + ... + 435166.

It is an arithmetic number, because the mean of its divisors is an integer number (18271008).

Almost surely, 2^124416721 is an apocalyptic number.

124416721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

124416721 is a deficient number, since it is larger than the sum of its proper divisors (21751343).

124416721 is a wasteful number, since it uses less digits than its factorization.

124416721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870071.

The product of its digits is 2688, while the sum is 28.

The square root of 124416721 is about 11154.2243567180. The cubic root of 124416721 is about 499.2210818699.

The spelling of 124416721 in words is "one hundred twenty-four million, four hundred sixteen thousand, seven hundred twenty-one".