1660259 has 2 divisors, whose sum is σ = 1660260. Its totient is φ = 1660258.

The previous prime is 1660247. The next prime is 1660261. The reversal of 1660259 is 9520661.

It is a strong prime.

It is an emirp because it is prime and its reverse (9520661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1660259 - 2¹² = 1656163 is a prime.

It is a Sophie Germain prime.

Together with 1660261, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (1660229) 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, 830129 + 830130.

It is an arithmetic number, because the mean of its divisors is an integer number (830130).

2^1660259 is an apocalyptic number.

1660259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660259 is an equidigital number, since it uses as much as digits as its factorization.

1660259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1660259 is about 1288.5103802453. The cubic root of 1660259 is about 118.4109724355.

It can be divided in two parts, 16602 and 59, that added together give a palindrome (16661).

The spelling of 1660259 in words is "one million, six hundred sixty thousand, two hundred fifty-nine".