32721025 has 6 divisors (see below), whose sum is σ = 40574102. Its totient is φ = 26176800.

The previous prime is 32721023. The next prime is 32721053. The reversal of 32721025 is 52012723.

It can be written as a sum of positive squares in 3 ways, for example, as 1181569 + 31539456 = 1087^2 + 5616^2 .

It is not a de Polignac number, because 32721025 - 2¹ = 32721023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32720987 and 32721005.

It is not an unprimeable number, because it can be changed into a prime (32721023) 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 5 ways as a sum of consecutive naturals, for example, 654396 + ... + 654445.

Almost surely, 2^32721025 is an apocalyptic number.

It is an amenable number.

32721025 is a deficient number, since it is larger than the sum of its proper divisors (7853077).

32721025 is a wasteful number, since it uses less digits than its factorization.

32721025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308851 (or 1308846 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 32721025 is about 5720.2294534398. The cubic root of 32721025 is about 319.8470134599.

Adding to 32721025 its reverse (52012723), we get a palindrome (84733748).

The spelling of 32721025 in words is "thirty-two million, seven hundred twenty-one thousand, twenty-five".