1273221 has 12 divisors (see below), whose sum is σ = 1851148. Its totient is φ = 843264.

The previous prime is 1273213. The next prime is 1273231. The reversal of 1273221 is 1223721.

It can be written as a sum of positive squares in 2 ways, for example, as 864900 + 408321 = 930^2 + 639^2 .

It is not a de Polignac number, because 1273221 - 2³ = 1273213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1273194 and 1273203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273231) 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 11 ways as a sum of consecutive naturals, for example, 1371 + ... + 2103.

2^1273221 is an apocalyptic number.

It is an amenable number.

1273221 is a deficient number, since it is larger than the sum of its proper divisors (577927).

1273221 is a wasteful number, since it uses less digits than its factorization.

1273221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932 (or 929 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 1273221 is about 1128.3709496438. The cubic root of 1273221 is about 108.3846878151.

Adding to 1273221 its reverse (1223721), we get a palindrome (2496942).

The spelling of 1273221 in words is "one million, two hundred seventy-three thousand, two hundred twenty-one".