19142287 has 2 divisors, whose sum is σ = 19142288. Its totient is φ = 19142286.

The previous prime is 19142269. The next prime is 19142297. The reversal of 19142287 is 78224191.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19142287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19142237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9571143 + 9571144.

It is an arithmetic number, because the mean of its divisors is an integer number (9571144).

Almost surely, 2^19142287 is an apocalyptic number.

19142287 is a deficient number, since it is larger than the sum of its proper divisors (1).

19142287 is an equidigital number, since it uses as much as digits as its factorization.

19142287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 19142287 is about 4375.1899387341. The cubic root of 19142287 is about 267.5046122593.

The spelling of 19142287 in words is "nineteen million, one hundred forty-two thousand, two hundred eighty-seven".