42190847 has 2 divisors, whose sum is σ = 42190848. Its totient is φ = 42190846.

The previous prime is 42190769. The next prime is 42190859. The reversal of 42190847 is 74809124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42190847 - 2⁸ = 42190591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42198847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21095423 + 21095424.

It is an arithmetic number, because the mean of its divisors is an integer number (21095424).

Almost surely, 2^42190847 is an apocalyptic number.

42190847 is a deficient number, since it is larger than the sum of its proper divisors (1).

42190847 is an equidigital number, since it uses as much as digits as its factorization.

42190847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 42190847 is about 6495.4481754533. The cubic root of 42190847 is about 348.1283684392.

The spelling of 42190847 in words is "forty-two million, one hundred ninety thousand, eight hundred forty-seven".