42007291 has 2 divisors, whose sum is σ = 42007292. Its totient is φ = 42007290.

The previous prime is 42007279. The next prime is 42007297. The reversal of 42007291 is 19270024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42007291 - 2²¹ = 39910139 is a prime.

It is a super-2 number, since 2×42007291² = 3529224994317362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42007297) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21003645 + 21003646.

It is an arithmetic number, because the mean of its divisors is an integer number (21003646).

Almost surely, 2^42007291 is an apocalyptic number.

42007291 is a deficient number, since it is larger than the sum of its proper divisors (1).

42007291 is an equidigital number, since it uses as much as digits as its factorization.

42007291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 42007291 is about 6481.3031868599. The cubic root of 42007291 is about 347.6227773806.

The spelling of 42007291 in words is "forty-two million, seven thousand, two hundred ninety-one".