32720725 has 6 divisors (see below), whose sum is σ = 40573730. Its totient is φ = 26176560.

The previous prime is 32720713. The next prime is 32720749. The reversal of 32720725 is 52702723.

It can be written as a sum of positive squares in 3 ways, for example, as 4937284 + 27783441 = 2222^2 + 5271^2 .

It is not a de Polignac number, because 32720725 - 2⁵ = 32720693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 32720693 and 32720702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 654390 + ... + 654439.

Almost surely, 2^32720725 is an apocalyptic number.

It is an amenable number.

32720725 is a deficient number, since it is larger than the sum of its proper divisors (7853005).

32720725 is a wasteful number, since it uses less digits than its factorization.

32720725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308839 (or 1308834 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 32720725 is about 5720.2032306554. The cubic root of 32720725 is about 319.8460359600.

The spelling of 32720725 in words is "thirty-two million, seven hundred twenty thousand, seven hundred twenty-five".