1299289 has 2 divisors, whose sum is σ = 1299290. Its totient is φ = 1299288.

The previous prime is 1299283. The next prime is 1299299. The reversal of 1299289 is 9829921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 751689 + 547600 = 867^2 + 740^2 .

It is an emirp because it is prime and its reverse (9829921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1299289 - 2⁵ = 1299257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1299283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649644 + 649645.

It is an arithmetic number, because the mean of its divisors is an integer number (649645).

2^1299289 is an apocalyptic number.

It is an amenable number.

1299289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299289 is an equidigital number, since it uses as much as digits as its factorization.

1299289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 40.

The square root of 1299289 is about 1139.8635883298. The cubic root of 1299289 is about 109.1193877459.

It can be divided in two parts, 1299 and 289, that multiplied together give a triangular number (375411 = T₈₆₆).

The spelling of 1299289 in words is "one million, two hundred ninety-nine thousand, two hundred eighty-nine".