1299247 has 4 divisors (see below), whose sum is σ = 1355760. Its totient is φ = 1242736.

The previous prime is 1299227. The next prime is 1299257. The reversal of 1299247 is 7429921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1299247 - 2¹⁹ = 774959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299227) 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 3 ways as a sum of consecutive naturals, for example, 28222 + ... + 28267.

It is an arithmetic number, because the mean of its divisors is an integer number (338940).

2^1299247 is an apocalyptic number.

1299247 is a deficient number, since it is larger than the sum of its proper divisors (56513).

1299247 is an equidigital number, since it uses as much as digits as its factorization.

1299247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56512.

The product of its digits is 9072, while the sum is 34.

The square root of 1299247 is about 1139.8451649237. The cubic root of 1299247 is about 109.1182119583.

The spelling of 1299247 in words is "one million, two hundred ninety-nine thousand, two hundred forty-seven".