42864491 has 2 divisors, whose sum is σ = 42864492. Its totient is φ = 42864490.

The previous prime is 42864473. The next prime is 42864511. The reversal of 42864491 is 19446824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42864491 - 2¹⁸ = 42602347 is a prime.

It is a Chen prime.

It is equal to p_2596916 and since 42864491 and 2596916 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42861491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21432245 + 21432246.

It is an arithmetic number, because the mean of its divisors is an integer number (21432246).

Almost surely, 2^42864491 is an apocalyptic number.

42864491 is a deficient number, since it is larger than the sum of its proper divisors (1).

42864491 is an equidigital number, since it uses as much as digits as its factorization.

42864491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 38.

The square root of 42864491 is about 6547.0979067065. The cubic root of 42864491 is about 349.9714017450.

The spelling of 42864491 in words is "forty-two million, eight hundred sixty-four thousand, four hundred ninety-one".