1299823 has 12 divisors (see below), whose sum is σ = 1551312. Its totient is φ = 1085280.

The previous prime is 1299821. The next prime is 1299827. The reversal of 1299823 is 3289921.

It is not a de Polignac number, because 1299823 - 2¹ = 1299821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1686 + ... + 2332.

It is an arithmetic number, because the mean of its divisors is an integer number (129276).

2^1299823 is an apocalyptic number.

1299823 is a deficient number, since it is larger than the sum of its proper divisors (251489).

1299823 is an equidigital number, since it uses as much as digits as its factorization.

1299823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702 (or 695 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 1299823 is about 1140.0978028222. The cubic root of 1299823 is about 109.1343348367.

The spelling of 1299823 in words is "one million, two hundred ninety-nine thousand, eight hundred twenty-three".