22042429 has 2 divisors, whose sum is σ = 22042430. Its totient is φ = 22042428.

The previous prime is 22042357. The next prime is 22042469. The reversal of 22042429 is 92424022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21874329 + 168100 = 4677^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 22042429 - 2⁷ = 22042301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22042469) 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, 11021214 + 11021215.

It is an arithmetic number, because the mean of its divisors is an integer number (11021215).

Almost surely, 2^22042429 is an apocalyptic number.

It is an amenable number.

22042429 is a deficient number, since it is larger than the sum of its proper divisors (1).

22042429 is an equidigital number, since it uses as much as digits as its factorization.

22042429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 22042429 is about 4694.9365277925. The cubic root of 22042429 is about 280.3839503079.

The spelling of 22042429 in words is "twenty-two million, forty-two thousand, four hundred twenty-nine".