1253221 has 8 divisors (see below), whose sum is σ = 1339200. Its totient is φ = 1169280.

The previous prime is 1253171. The next prime is 1253249. The reversal of 1253221 is 1223521.

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 1253221 - 2⁷ = 1253093 is a prime.

It is a super-3 number, since 3×1253221³ = 5904787129713338583, which contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1253195 and 1253204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 885 + ... + 1813.

It is an arithmetic number, because the mean of its divisors is an integer number (167400).

2^1253221 is an apocalyptic number.

It is an amenable number.

1253221 is a deficient number, since it is larger than the sum of its proper divisors (85979).

1253221 is an equidigital number, since it uses as much as digits as its factorization.

1253221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019.

The product of its digits is 120, while the sum is 16.

The square root of 1253221 is about 1119.4735369807. The cubic root of 1253221 is about 107.8141809302.

Adding to 1253221 its reverse (1223521), we get a palindrome (2476742).

The spelling of 1253221 in words is "one million, two hundred fifty-three thousand, two hundred twenty-one".