124451221 has 2 divisors, whose sum is σ = 124451222. Its totient is φ = 124451220.

The previous prime is 124451213. The next prime is 124451251. The reversal of 124451221 is 122154421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66096900 + 58354321 = 8130^2 + 7639^2 .

It is a cyclic number.

It is not a de Polignac number, because 124451221 - 2³ = 124451213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 124451192 and 124451201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124451251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62225610 + 62225611.

It is an arithmetic number, because the mean of its divisors is an integer number (62225611).

Almost surely, 2^124451221 is an apocalyptic number.

It is an amenable number.

124451221 is a deficient number, since it is larger than the sum of its proper divisors (1).

124451221 is an equidigital number, since it uses as much as digits as its factorization.

124451221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640, while the sum is 22.

The square root of 124451221 is about 11155.7707488098. The cubic root of 124451221 is about 499.2672212619.

The spelling of 124451221 in words is "one hundred twenty-four million, four hundred fifty-one thousand, two hundred twenty-one".