126221224 has 32 divisors (see below), whose sum is σ = 247617000. Its totient is φ = 60239872.

The previous prime is 126221219. The next prime is 126221257. The reversal of 126221224 is 422122621.

It can be written as a sum of positive squares in 4 ways, for example, as 95062500 + 31158724 = 9750^2 + 5582^2 .

It is a junction number, because it is equal to n+sod(n) for n = 126221195 and 126221204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17592 + ... + 23704.

Almost surely, 2^126221224 is an apocalyptic number.

It is an amenable number.

126221224 is a deficient number, since it is larger than the sum of its proper divisors (121395776).

126221224 is a wasteful number, since it uses less digits than its factorization.

126221224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6237 (or 6233 counting only the distinct ones).

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

The square root of 126221224 is about 11234.8219389539. The cubic root of 126221224 is about 501.6230245488.

Adding to 126221224 its reverse (422122621), we get a palindrome (548343845).

The spelling of 126221224 in words is "one hundred twenty-six million, two hundred twenty-one thousand, two hundred twenty-four".