32672721 has 8 divisors (see below), whose sum is σ = 43658784. Its totient is φ = 21734240.

The previous prime is 32672711. The next prime is 32672737. The reversal of 32672721 is 12727623.

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

It is a cyclic number.

It is not a de Polignac number, because 32672721 - 2¹³ = 32664529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (32672711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10260 + ... + 13061.

It is an arithmetic number, because the mean of its divisors is an integer number (5457348).

Almost surely, 2^32672721 is an apocalyptic number.

It is an amenable number.

32672721 is a deficient number, since it is larger than the sum of its proper divisors (10986063).

32672721 is a wasteful number, since it uses less digits than its factorization.

32672721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23791.

The product of its digits is 7056, while the sum is 30.

The square root of 32672721 is about 5716.0056857914. The cubic root of 32672721 is about 319.6895459097.

The spelling of 32672721 in words is "thirty-two million, six hundred seventy-two thousand, seven hundred twenty-one".