124717321 has 16 divisors (see below), whose sum is σ = 135594000. Its totient is φ = 114270208.

The previous prime is 124717319. The next prime is 124717337. The reversal of 124717321 is 123717421.

124717321 is a nontrivial binomial coefficient, being equal to C(15794, 2).

It can be written as a sum of positive squares in 8 ways, for example, as 9455625 + 115261696 = 3075^2 + 10736^2 .

It is a cyclic number.

It is not a de Polignac number, because 124717321 - 2¹ = 124717319 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 124717321.

It is not an unprimeable number, because it can be changed into a prime (124717421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133785 + ... + 134713.

It is an arithmetic number, because the mean of its divisors is an integer number (8474625).

Almost surely, 2^124717321 is an apocalyptic number.

124717321 is the 15793-rd triangular number and also the 7897-th hexagonal number.

124717321 is the 5265-th centered nonagonal number.

It is an amenable number.

124717321 is a deficient number, since it is larger than the sum of its proper divisors (10876679).

124717321 is a wasteful number, since it uses less digits than its factorization.

124717321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148.

The product of its digits is 2352, while the sum is 28.

The square root of 124717321 is about 11167.6909430732. The cubic root of 124717321 is about 499.6228101939.

The spelling of 124717321 in words is "one hundred twenty-four million, seven hundred seventeen thousand, three hundred twenty-one".