1455221 has 4 divisors (see below), whose sum is σ = 1482732. Its totient is φ = 1427712.

The previous prime is 1455211. The next prime is 1455227. The reversal of 1455221 is 1225541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 483025 + 972196 = 695^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 1455221 - 2¹⁴ = 1438837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1455193 and 1455202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1455227) 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 3 ways as a sum of consecutive naturals, for example, 13676 + ... + 13781.

It is an arithmetic number, because the mean of its divisors is an integer number (370683).

2^1455221 is an apocalyptic number.

It is an amenable number.

1455221 is a deficient number, since it is larger than the sum of its proper divisors (27511).

1455221 is an equidigital number, since it uses as much as digits as its factorization.

1455221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27510.

The product of its digits is 400, while the sum is 20.

The square root of 1455221 is about 1206.3254121505. The cubic root of 1455221 is about 113.3208050357.

The spelling of 1455221 in words is "one million, four hundred fifty-five thousand, two hundred twenty-one".