1299997 has 4 divisors (see below), whose sum is σ = 1302336. Its totient is φ = 1297660.

The previous prime is 1299989. The next prime is 1300021. The reversal of 1299997 is 7999921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1299997 - 2³ = 1299989 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 (1299917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198 + ... + 1624.

It is an arithmetic number, because the mean of its divisors is an integer number (325584).

2^1299997 is an apocalyptic number.

It is an amenable number.

1299997 is a deficient number, since it is larger than the sum of its proper divisors (2339).

1299997 is an equidigital number, since it uses as much as digits as its factorization.

1299997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338.

The product of its digits is 91854, while the sum is 46.

The square root of 1299997 is about 1140.1741095114. The cubic root of 1299997 is about 109.1392043527.

The spelling of 1299997 in words is "one million, two hundred ninety-nine thousand, nine hundred ninety-seven".