1297221 has 8 divisors (see below), whose sum is σ = 1735680. Its totient is φ = 861792.

The previous prime is 1297217. The next prime is 1297229. The reversal of 1297221 is 1227921.

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

It is not a de Polignac number, because 1297221 - 2² = 1297217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1297191 and 1297200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585 + ... + 1713.

It is an arithmetic number, because the mean of its divisors is an integer number (216960).

2^1297221 is an apocalyptic number.

It is an amenable number.

1297221 is a deficient number, since it is larger than the sum of its proper divisors (438459).

1297221 is a wasteful number, since it uses less digits than its factorization.

1297221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515.

The product of its digits is 504, while the sum is 24.

The square root of 1297221 is about 1138.9561009978. The cubic root of 1297221 is about 109.0614640860.

The spelling of 1297221 in words is "one million, two hundred ninety-seven thousand, two hundred twenty-one".