16042591 has 2 divisors, whose sum is σ = 16042592. Its totient is φ = 16042590.

The previous prime is 16042583. The next prime is 16042601. The reversal of 16042591 is 19524061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16042591 - 2³ = 16042583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16042501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8021295 + 8021296.

It is an arithmetic number, because the mean of its divisors is an integer number (8021296).

Almost surely, 2^16042591 is an apocalyptic number.

16042591 is a deficient number, since it is larger than the sum of its proper divisors (1).

16042591 is an equidigital number, since it uses as much as digits as its factorization.

16042591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 16042591 is about 4005.3203367521. The cubic root of 16042591 is about 252.2076006181.

The spelling of 16042591 in words is "sixteen million, forty-two thousand, five hundred ninety-one".