42917591 has 2 divisors, whose sum is σ = 42917592. Its totient is φ = 42917590.

The previous prime is 42917573. The next prime is 42917617. The reversal of 42917591 is 19571924.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42917591 - 2¹⁰ = 42916567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42911591) 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, 21458795 + 21458796.

It is an arithmetic number, because the mean of its divisors is an integer number (21458796).

Almost surely, 2^42917591 is an apocalyptic number.

42917591 is a deficient number, since it is larger than the sum of its proper divisors (1).

42917591 is an equidigital number, since it uses as much as digits as its factorization.

42917591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 38.

The square root of 42917591 is about 6551.1518834477. The cubic root of 42917591 is about 350.1158555233.

The spelling of 42917591 in words is "forty-two million, nine hundred seventeen thousand, five hundred ninety-one".