1299897 has 12 divisors (see below), whose sum is σ = 1898260. Its totient is φ = 857088.

The previous prime is 1299887. The next prime is 1299899. The reversal of 1299897 is 7989921.

It can be written as a sum of positive squares in 2 ways, for example, as 423801 + 876096 = 651^2 + 936^2 .

It is not a de Polignac number, because 1299897 - 2⁶ = 1299833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1299899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129 + ... + 1617.

2^1299897 is an apocalyptic number.

It is an amenable number.

1299897 is a deficient number, since it is larger than the sum of its proper divisors (598363).

1299897 is a wasteful number, since it uses less digits than its factorization.

1299897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592 (or 1589 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 1299897 is about 1140.1302557164. The cubic root of 1299897 is about 109.1364058334.

The spelling of 1299897 in words is "one million, two hundred ninety-nine thousand, eight hundred ninety-seven".