42274709 has 2 divisors, whose sum is σ = 42274710. Its totient is φ = 42274708.

The previous prime is 42274703. The next prime is 42274711. The reversal of 42274709 is 90747224.

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., 40576900 + 1697809 = 6370^2 + 1303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42274709 is a prime.

Together with 42274711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42274703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21137354 + 21137355.

It is an arithmetic number, because the mean of its divisors is an integer number (21137355).

Almost surely, 2^42274709 is an apocalyptic number.

It is an amenable number.

42274709 is a deficient number, since it is larger than the sum of its proper divisors (1).

42274709 is an equidigital number, since it uses as much as digits as its factorization.

42274709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 42274709 is about 6501.9004144942. The cubic root of 42274709 is about 348.3588719832.

The spelling of 42274709 in words is "forty-two million, two hundred seventy-four thousand, seven hundred nine".