1323641 has 4 divisors (see below), whose sum is σ = 1443984. Its totient is φ = 1203300.

The previous prime is 1323629. The next prime is 1323649. The reversal of 1323641 is 1463231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1323641 - 2⁶ = 1323577 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323649) 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, 60155 + ... + 60176.

It is an arithmetic number, because the mean of its divisors is an integer number (360996).

2^1323641 is an apocalyptic number.

1323641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1323641 is a deficient number, since it is larger than the sum of its proper divisors (120343).

1323641 is a wasteful number, since it uses less digits than its factorization.

1323641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120342.

The product of its digits is 432, while the sum is 20.

The square root of 1323641 is about 1150.4959800017. The cubic root of 1323641 is about 109.7968979541.

Adding to 1323641 its reverse (1463231), we get a palindrome (2786872).

It can be divided in two parts, 132 and 3641, that added together give a palindrome (3773).

The spelling of 1323641 in words is "one million, three hundred twenty-three thousand, six hundred forty-one".