32720045 has 4 divisors (see below), whose sum is σ = 39264060. Its totient is φ = 26176032.

The previous prime is 32720041. The next prime is 32720063. The reversal of 32720045 is 54002723.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3678724 + 29041321 = 1918^2 + 5389^2 .

It is a cyclic number.

It is not a de Polignac number, because 32720045 - 2² = 32720041 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 32720045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32720041) 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, 3272000 + ... + 3272009.

It is an arithmetic number, because the mean of its divisors is an integer number (9816015).

Almost surely, 2^32720045 is an apocalyptic number.

It is an amenable number.

32720045 is a deficient number, since it is larger than the sum of its proper divisors (6544015).

32720045 is an equidigital number, since it uses as much as digits as its factorization.

32720045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6544014.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 32720045 is about 5720.1437918989. The cubic root of 32720045 is about 319.8438202714.

Adding to 32720045 its reverse (54002723), we get a palindrome (86722768).

The spelling of 32720045 in words is "thirty-two million, seven hundred twenty thousand, forty-five".