124402221 has 6 divisors (see below), whose sum is σ = 179692110. Its totient is φ = 82934808.

The previous prime is 124402217. The next prime is 124402231. The reversal of 124402221 is 122204421.

124402221 is a `hidden beast` number, since 1 + 2 + 440 + 2 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 124077321 + 324900 = 11139^2 + 570^2 .

It is not a de Polignac number, because 124402221 - 2² = 124402217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 124402194 and 124402203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124402231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6911226 + ... + 6911243.

It is an arithmetic number, because the mean of its divisors is an integer number (29948685).

Almost surely, 2^124402221 is an apocalyptic number.

It is an amenable number.

124402221 is a deficient number, since it is larger than the sum of its proper divisors (55289889).

124402221 is a wasteful number, since it uses less digits than its factorization.

124402221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13822475 (or 13822472 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 124402221 is about 11153.5743598185. The cubic root of 124402221 is about 499.2016874057.

Adding to 124402221 its reverse (122204421), we get a palindrome (246606642).

The spelling of 124402221 in words is "one hundred twenty-four million, four hundred two thousand, two hundred twenty-one".