124124821 has 2 divisors, whose sum is σ = 124124822. Its totient is φ = 124124820.

The previous prime is 124124801. The next prime is 124124831. The reversal of 124124821 is 128421421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87048900 + 37075921 = 9330^2 + 6089^2 .

It is a cyclic number.

It is not a de Polignac number, because 124124821 - 2¹⁵ = 124092053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124124801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62062410 + 62062411.

It is an arithmetic number, because the mean of its divisors is an integer number (62062411).

Almost surely, 2^124124821 is an apocalyptic number.

It is an amenable number.

124124821 is a deficient number, since it is larger than the sum of its proper divisors (1).

124124821 is an equidigital number, since it uses as much as digits as its factorization.

124124821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1024, while the sum is 25.

The square root of 124124821 is about 11141.1319442865. The cubic root of 124124821 is about 498.8303606879.

It can be divided in two parts, 1241 and 24821, that added together give a palindrome (26062).

The spelling of 124124821 in words is "one hundred twenty-four million, one hundred twenty-four thousand, eight hundred twenty-one".