3231645 has 8 divisors (see below), whose sum is σ = 5170656. Its totient is φ = 1723536.

The previous prime is 3231643. The next prime is 3231667. The reversal of 3231645 is 5461323.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3231645 - 2¹ = 3231643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107707 + ... + 107736.

It is an arithmetic number, because the mean of its divisors is an integer number (646332).

Almost surely, 2^3231645 is an apocalyptic number.

It is an amenable number.

3231645 is a deficient number, since it is larger than the sum of its proper divisors (1939011).

3231645 is a wasteful number, since it uses less digits than its factorization.

3231645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215451.

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

The square root of 3231645 is about 1797.6776685491. The cubic root of 3231645 is about 147.8454223680.

Adding to 3231645 its reverse (5461323), we get a palindrome (8692968).

The spelling of 3231645 in words is "three million, two hundred thirty-one thousand, six hundred forty-five".