1299399 has 8 divisors (see below), whose sum is σ = 1742832. Its totient is φ = 861120.

The previous prime is 1299379. The next prime is 1299437. The reversal of 1299399 is 9939921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1299399 - 2⁵ = 1299367 is a prime.

It is a super-2 number, since 2×1299399² = 3376875522402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1299399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299349) 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 7 ways as a sum of consecutive naturals, for example, 654 + ... + 1739.

It is an arithmetic number, because the mean of its divisors is an integer number (217854).

2^1299399 is an apocalyptic number.

1299399 is a deficient number, since it is larger than the sum of its proper divisors (443433).

1299399 is a wasteful number, since it uses less digits than its factorization.

1299399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577.

The product of its digits is 39366, while the sum is 42.

The square root of 1299399 is about 1139.9118386963. The cubic root of 1299399 is about 109.1224670695.

The spelling of 1299399 in words is "one million, two hundred ninety-nine thousand, three hundred ninety-nine".