1297723 has 8 divisors (see below), whose sum is σ = 1505792. Its totient is φ = 1095336.

The previous prime is 1297693. The next prime is 1297727. The reversal of 1297723 is 3277921.

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

It is a cyclic number.

It is not a de Polignac number, because 1297723 - 2⁹ = 1297211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1297727) 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, 915 + ... + 1852.

It is an arithmetic number, because the mean of its divisors is an integer number (188224).

2^1297723 is an apocalyptic number.

1297723 is a deficient number, since it is larger than the sum of its proper divisors (208069).

1297723 is an equidigital number, since it uses as much as digits as its factorization.

1297723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2841.

The product of its digits is 5292, while the sum is 31.

The square root of 1297723 is about 1139.1764569196. The cubic root of 1297723 is about 109.0755305132.

The spelling of 1297723 in words is "one million, two hundred ninety-seven thousand, seven hundred twenty-three".