126269221 has 4 divisors (see below), whose sum is σ = 135982252. Its totient is φ = 116556192.

The previous prime is 126269203. The next prime is 126269233. The reversal of 126269221 is 122962621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122962621 = 67 ⋅1835263.

It can be written as a sum of positive squares in 2 ways, for example, as 37344321 + 88924900 = 6111^2 + 9430^2 .

It is a cyclic number.

It is not a de Polignac number, because 126269221 - 2⁷ = 126269093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126269021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4856496 + ... + 4856521.

It is an arithmetic number, because the mean of its divisors is an integer number (33995563).

Almost surely, 2^126269221 is an apocalyptic number.

It is an amenable number.

126269221 is a deficient number, since it is larger than the sum of its proper divisors (9713031).

126269221 is an equidigital number, since it uses as much as digits as its factorization.

126269221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9713030.

The product of its digits is 5184, while the sum is 31.

The square root of 126269221 is about 11236.9578178438. The cubic root of 126269221 is about 501.6865990371.

The spelling of 126269221 in words is "one hundred twenty-six million, two hundred sixty-nine thousand, two hundred twenty-one".