42459643 has 2 divisors, whose sum is σ = 42459644. Its totient is φ = 42459642.

The previous prime is 42459631. The next prime is 42459649. The reversal of 42459643 is 34695424.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42459643 is a prime.

It is equal to p_2573866 and since 42459643 and 2573866 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 (42459649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21229821 + 21229822.

It is an arithmetic number, because the mean of its divisors is an integer number (21229822).

Almost surely, 2^42459643 is an apocalyptic number.

42459643 is a deficient number, since it is larger than the sum of its proper divisors (1).

42459643 is an equidigital number, since it uses as much as digits as its factorization.

42459643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 37.

The square root of 42459643 is about 6516.1064294562. The cubic root of 42459643 is about 348.8661073735.

The spelling of 42459643 in words is "forty-two million, four hundred fifty-nine thousand, six hundred forty-three".