126224521 has 2 divisors, whose sum is σ = 126224522. Its totient is φ = 126224520.

The previous prime is 126224477. The next prime is 126224537. The reversal of 126224521 is 125422621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109935225 + 16289296 = 10485^2 + 4036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126224521 is a prime.

It is not a weakly prime, because it can be changed into another prime (126224551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63112260 + 63112261.

It is an arithmetic number, because the mean of its divisors is an integer number (63112261).

Almost surely, 2^126224521 is an apocalyptic number.

It is an amenable number.

126224521 is a deficient number, since it is larger than the sum of its proper divisors (1).

126224521 is an equidigital number, since it uses as much as digits as its factorization.

126224521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 25.

The square root of 126224521 is about 11234.9686692932. The cubic root of 126224521 is about 501.6273921099.

The spelling of 126224521 in words is "one hundred twenty-six million, two hundred twenty-four thousand, five hundred twenty-one".