42221269 has 2 divisors, whose sum is σ = 42221270. Its totient is φ = 42221268.

The previous prime is 42221243. The next prime is 42221273. The reversal of 42221269 is 96212224.

42221269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28494244 + 13727025 = 5338^2 + 3705^2 .

It is a cyclic number.

It is not a de Polignac number, because 42221269 - 2⁹ = 42220757 is a prime.

It is a super-2 number, since 2×42221269² = 3565271111940722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42221209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21110634 + 21110635.

It is an arithmetic number, because the mean of its divisors is an integer number (21110635).

Almost surely, 2^42221269 is an apocalyptic number.

It is an amenable number.

42221269 is a deficient number, since it is larger than the sum of its proper divisors (1).

42221269 is an equidigital number, since it uses as much as digits as its factorization.

42221269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 42221269 is about 6497.7895472230. The cubic root of 42221269 is about 348.2120217865.

The spelling of 42221269 in words is "forty-two million, two hundred twenty-one thousand, two hundred sixty-nine".