124613821 has 2 divisors, whose sum is σ = 124613822. Its totient is φ = 124613820.

The previous prime is 124613809. The next prime is 124613833. The reversal of 124613821 is 128316421.

It is a balanced prime because it is at equal distance from previous prime (124613809) and next prime (124613833).

It can be written as a sum of positive squares in only one way, i.e., 121771225 + 2842596 = 11035^2 + 1686^2 .

It is an emirp because it is prime and its reverse (128316421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124613821 - 2¹⁵ = 124581053 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 124613821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124613851) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62306910 + 62306911.

It is an arithmetic number, because the mean of its divisors is an integer number (62306911).

Almost surely, 2^124613821 is an apocalyptic number.

It is an amenable number.

124613821 is a deficient number, since it is larger than the sum of its proper divisors (1).

124613821 is an equidigital number, since it uses as much as digits as its factorization.

124613821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

The square root of 124613821 is about 11163.0560779743. The cubic root of 124613821 is about 499.4845634997.

The spelling of 124613821 in words is "one hundred twenty-four million, six hundred thirteen thousand, eight hundred twenty-one".