1331423 has 8 divisors (see below), whose sum is σ = 1419840. Its totient is φ = 1248480.

The previous prime is 1331411. The next prime is 1331431. The reversal of 1331423 is 3241331.

It is a happy number.

It is not a de Polignac number, because 1331423 - 2²⁰ = 282847 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331443) 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 7 ways as a sum of consecutive naturals, for example, 4778 + ... + 5048.

It is an arithmetic number, because the mean of its divisors is an integer number (177480).

2^1331423 is an apocalyptic number.

1331423 is a deficient number, since it is larger than the sum of its proper divisors (88417).

1331423 is an frugal number, since it uses more digits than its factorization.

1331423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 288 counting only the distinct ones).

The product of its digits is 216, while the sum is 17.

The square root of 1331423 is about 1153.8730432764. The cubic root of 1331423 is about 110.0116516583.

Adding to 1331423 its reverse (3241331), we get a palindrome (4572754).

The spelling of 1331423 in words is "one million, three hundred thirty-one thousand, four hundred twenty-three".