42423229 has 2 divisors, whose sum is σ = 42423230. Its totient is φ = 42423228.

The previous prime is 42423223. The next prime is 42423263. The reversal of 42423229 is 92232424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29268100 + 13155129 = 5410^2 + 3627^2 .

It is a cyclic number.

It is not a de Polignac number, because 42423229 - 2⁵ = 42423197 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42423197 and 42423206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42423223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21211614 + 21211615.

It is an arithmetic number, because the mean of its divisors is an integer number (21211615).

Almost surely, 2^42423229 is an apocalyptic number.

It is an amenable number.

42423229 is a deficient number, since it is larger than the sum of its proper divisors (1).

42423229 is an equidigital number, since it uses as much as digits as its factorization.

42423229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 28.

The square root of 42423229 is about 6513.3116768661. The cubic root of 42423229 is about 348.7663479873.

It can be divided in two parts, 424 and 23229, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 42423229 in words is "forty-two million, four hundred twenty-three thousand, two hundred twenty-nine".