1323645 has 16 divisors (see below), whose sum is σ = 2146560. Its totient is φ = 696384.

The previous prime is 1323629. The next prime is 1323649. The reversal of 1323645 is 5463231.

It is a happy number.

It is not a de Polignac number, because 1323645 - 2⁴ = 1323629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323649) 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 15 ways as a sum of consecutive naturals, for example, 627 + ... + 1743.

It is an arithmetic number, because the mean of its divisors is an integer number (134160).

2^1323645 is an apocalyptic number.

1323645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1323645 is a deficient number, since it is larger than the sum of its proper divisors (822915).

1323645 is a wasteful number, since it uses less digits than its factorization.

1323645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204.

The product of its digits is 2160, while the sum is 24.

The square root of 1323645 is about 1150.4977183810. The cubic root of 1323645 is about 109.7970085548.

Adding to 1323645 its reverse (5463231), we get a palindrome (6786876).

The spelling of 1323645 in words is "one million, three hundred twenty-three thousand, six hundred forty-five".