1491323 has 4 divisors (see below), whose sum is σ = 1495008. Its totient is φ = 1487640.

The previous prime is 1491299. The next prime is 1491377. The reversal of 1491323 is 3231941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3231941 = 1531 ⋅2111.

It is a cyclic number.

It is not a de Polignac number, because 1491323 - 2¹⁰ = 1490299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431323) 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, 1148 + ... + 2073.

It is an arithmetic number, because the mean of its divisors is an integer number (373752).

2^1491323 is an apocalyptic number.

1491323 is a deficient number, since it is larger than the sum of its proper divisors (3685).

1491323 is an equidigital number, since it uses as much as digits as its factorization.

1491323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3684.

The product of its digits is 648, while the sum is 23.

The square root of 1491323 is about 1221.1973632464. The cubic root of 1491323 is about 114.2502709288.

The spelling of 1491323 in words is "one million, four hundred ninety-one thousand, three hundred twenty-three".