2191459 has 2 divisors, whose sum is σ = 2191460. Its totient is φ = 2191458.

The previous prime is 2191457. The next prime is 2191471. The reversal of 2191459 is 9541912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2191459 - 2¹ = 2191457 is a prime.

Together with 2191457, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2191459.

It is not a weakly prime, because it can be changed into another prime (2191451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095729 + 1095730.

It is an arithmetic number, because the mean of its divisors is an integer number (1095730).

2^2191459 is an apocalyptic number.

2191459 is a deficient number, since it is larger than the sum of its proper divisors (1).

2191459 is an equidigital number, since it uses as much as digits as its factorization.

2191459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 31.

The square root of 2191459 is about 1480.3577270376. The cubic root of 2191459 is about 129.8906180511.

The spelling of 2191459 in words is "two million, one hundred ninety-one thousand, four hundred fifty-nine".