42227429 has 2 divisors, whose sum is σ = 42227430. Its totient is φ = 42227428.

The previous prime is 42227411. The next prime is 42227461. The reversal of 42227429 is 92472224.

It is an a-pointer prime, because the next prime (42227461) can be obtained adding 42227429 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39715204 + 2512225 = 6302^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 42227429 - 2⁸ = 42227173 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42227395 and 42227404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42227489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21113714 + 21113715.

It is an arithmetic number, because the mean of its divisors is an integer number (21113715).

Almost surely, 2^42227429 is an apocalyptic number.

It is an amenable number.

42227429 is a deficient number, since it is larger than the sum of its proper divisors (1).

42227429 is an equidigital number, since it uses as much as digits as its factorization.

42227429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 32.

The square root of 42227429 is about 6498.2635372844. The cubic root of 42227429 is about 348.2289554457.

The spelling of 42227429 in words is "forty-two million, two hundred twenty-seven thousand, four hundred twenty-nine".