1491223 has 4 divisors (see below), whose sum is σ = 1578960. Its totient is φ = 1403488.

The previous prime is 1491199. The next prime is 1491227. The reversal of 1491223 is 3221941.

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

It is a cyclic number.

It is not a de Polignac number, because 1491223 - 2⁹ = 1490711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1491194 and 1491203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491227) 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, 43843 + ... + 43876.

It is an arithmetic number, because the mean of its divisors is an integer number (394740).

2^1491223 is an apocalyptic number.

1491223 is a deficient number, since it is larger than the sum of its proper divisors (87737).

1491223 is an equidigital number, since it uses as much as digits as its factorization.

1491223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87736.

The product of its digits is 432, while the sum is 22.

The square root of 1491223 is about 1221.1564191372. The cubic root of 1491223 is about 114.2477172047.

The spelling of 1491223 in words is "one million, four hundred ninety-one thousand, two hundred twenty-three".