1297856 has 28 divisors (see below), whose sum is σ = 2944368. Its totient is φ = 556032.

The previous prime is 1297853. The next prime is 1297873. The reversal of 1297856 is 6587921.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297853) 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, 1001 + ... + 1896.

It is an arithmetic number, because the mean of its divisors is an integer number (105156).

2^1297856 is an apocalyptic number.

1297856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1297856 is an abundant number, since it is smaller than the sum of its proper divisors (1646512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1297856 is an equidigital number, since it uses as much as digits as its factorization.

1297856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916 (or 2906 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 1297856 is about 1139.2348309282. The cubic root of 1297856 is about 109.0792566679.

The spelling of 1297856 in words is "one million, two hundred ninety-seven thousand, eight hundred fifty-six".