42994271 has 2 divisors, whose sum is σ = 42994272. Its totient is φ = 42994270.

The previous prime is 42994247. The next prime is 42994277. The reversal of 42994271 is 17249924.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42994271 is a prime.

It is a super-3 number, since 3×42994271³ (a number of 24 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42994277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21497135 + 21497136.

It is an arithmetic number, because the mean of its divisors is an integer number (21497136).

Almost surely, 2^42994271 is an apocalyptic number.

42994271 is a deficient number, since it is larger than the sum of its proper divisors (1).

42994271 is an equidigital number, since it uses as much as digits as its factorization.

42994271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 42994271 is about 6557.0016775962. The cubic root of 42994271 is about 350.3242464581.

The spelling of 42994271 in words is "forty-two million, nine hundred ninety-four thousand, two hundred seventy-one".