42294809 has 2 divisors, whose sum is σ = 42294810. Its totient is φ = 42294808.

The previous prime is 42294773. The next prime is 42294823. The reversal of 42294809 is 90849224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32035600 + 10259209 = 5660^2 + 3203^2 .

It is a cyclic number.

It is not a de Polignac number, because 42294809 - 2¹⁶ = 42229273 is a prime.

It is not a weakly prime, because it can be changed into another prime (42294869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21147404 + 21147405.

It is an arithmetic number, because the mean of its divisors is an integer number (21147405).

Almost surely, 2^42294809 is an apocalyptic number.

It is an amenable number.

42294809 is a deficient number, since it is larger than the sum of its proper divisors (1).

42294809 is an equidigital number, since it uses as much as digits as its factorization.

42294809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 42294809 is about 6503.4459327344. The cubic root of 42294809 is about 348.4140736554.

The spelling of 42294809 in words is "forty-two million, two hundred ninety-four thousand, eight hundred nine".