124143421 has 2 divisors, whose sum is σ = 124143422. Its totient is φ = 124143420.

The previous prime is 124143391. The next prime is 124143427. The reversal of 124143421 is 124341421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100280196 + 23863225 = 10014^2 + 4885^2 .

It is an emirp because it is prime and its reverse (124341421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124143421 - 2¹⁵ = 124110653 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 124143392 and 124143401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124143427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62071710 + 62071711.

It is an arithmetic number, because the mean of its divisors is an integer number (62071711).

Almost surely, 2^124143421 is an apocalyptic number.

It is an amenable number.

124143421 is a deficient number, since it is larger than the sum of its proper divisors (1).

124143421 is an equidigital number, since it uses as much as digits as its factorization.

124143421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 22.

The square root of 124143421 is about 11141.9666576417. The cubic root of 124143421 is about 498.8552758801.

Adding to 124143421 its reverse (124341421), we get a palindrome (248484842).

The spelling of 124143421 in words is "one hundred twenty-four million, one hundred forty-three thousand, four hundred twenty-one".