42084397 has 2 divisors, whose sum is σ = 42084398. Its totient is φ = 42084396.

The previous prime is 42084353. The next prime is 42084407. The reversal of 42084397 is 79348024.

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., 31933801 + 10150596 = 5651^2 + 3186^2 .

It is a cyclic number.

It is not a de Polignac number, because 42084397 - 2⁷ = 42084269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42084697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21042198 + 21042199.

It is an arithmetic number, because the mean of its divisors is an integer number (21042199).

Almost surely, 2^42084397 is an apocalyptic number.

It is an amenable number.

42084397 is a deficient number, since it is larger than the sum of its proper divisors (1).

42084397 is an equidigital number, since it uses as much as digits as its factorization.

42084397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 42084397 is about 6487.2488005317. The cubic root of 42084397 is about 347.8353390426.

The spelling of 42084397 in words is "forty-two million, eighty-four thousand, three hundred ninety-seven".