1451221 has 4 divisors (see below), whose sum is σ = 1454112. Its totient is φ = 1448332.

The previous prime is 1451213. The next prime is 1451237. The reversal of 1451221 is 1221541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1451221 - 2³ = 1451213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1451195 and 1451204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1451291) 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, 475 + ... + 1768.

It is an arithmetic number, because the mean of its divisors is an integer number (363528).

2^1451221 is an apocalyptic number.

It is an amenable number.

1451221 is a deficient number, since it is larger than the sum of its proper divisors (2891).

1451221 is an equidigital number, since it uses as much as digits as its factorization.

1451221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890.

The product of its digits is 80, while the sum is 16.

The square root of 1451221 is about 1204.6663438480. Note that the first 3 decimals coincide. The cubic root of 1451221 is about 113.2168805752.

Adding to 1451221 its reverse (1221541), we get a palindrome (2672762).

The spelling of 1451221 in words is "one million, four hundred fifty-one thousand, two hundred twenty-one".