124071421 has 2 divisors, whose sum is σ = 124071422. Its totient is φ = 124071420.

The previous prime is 124071419. The next prime is 124071427. The reversal of 124071421 is 124170421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63776196 + 60295225 = 7986^2 + 7765^2 .

It is an emirp because it is prime and its reverse (124170421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124071421 - 2¹ = 124071419 is a prime.

Together with 124071419, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 124071392 and 124071401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124071427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62035710 + 62035711.

It is an arithmetic number, because the mean of its divisors is an integer number (62035711).

Almost surely, 2^124071421 is an apocalyptic number.

It is an amenable number.

124071421 is a deficient number, since it is larger than the sum of its proper divisors (1).

124071421 is an equidigital number, since it uses as much as digits as its factorization.

124071421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 124071421 is about 11138.7351615881. The cubic root of 124071421 is about 498.7588161414.

The spelling of 124071421 in words is "one hundred twenty-four million, seventy-one thousand, four hundred twenty-one".