42306491 has 2 divisors, whose sum is σ = 42306492. Its totient is φ = 42306490.

The previous prime is 42306469. The next prime is 42306527. The reversal of 42306491 is 19460324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42306491 - 2²² = 38112187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42306401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21153245 + 21153246.

It is an arithmetic number, because the mean of its divisors is an integer number (21153246).

Almost surely, 2^42306491 is an apocalyptic number.

42306491 is a deficient number, since it is larger than the sum of its proper divisors (1).

42306491 is an equidigital number, since it uses as much as digits as its factorization.

42306491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 42306491 is about 6504.3440099675. The cubic root of 42306491 is about 348.4461485020.

The spelling of 42306491 in words is "forty-two million, three hundred six thousand, four hundred ninety-one".