10032721 has 4 divisors (see below), whose sum is σ = 10072944. Its totient is φ = 9992500.

The previous prime is 10032713. The next prime is 10032739. The reversal of 10032721 is 12723001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12723001 = 307 ⋅41443.

It is a cyclic number.

It is not a de Polignac number, because 10032721 - 2³ = 10032713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10032695 and 10032704.

It is not an unprimeable number, because it can be changed into a prime (10032751) 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, 19735 + ... + 20236.

It is an arithmetic number, because the mean of its divisors is an integer number (2518236).

Almost surely, 2^10032721 is an apocalyptic number.

It is an amenable number.

10032721 is a deficient number, since it is larger than the sum of its proper divisors (40223).

10032721 is an equidigital number, since it uses as much as digits as its factorization.

10032721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40222.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 10032721 is about 3167.4470792738. The cubic root of 10032721 is about 215.6781973625.

Adding to 10032721 its reverse (12723001), we get a palindrome (22755722).

The spelling of 10032721 in words is "ten million, thirty-two thousand, seven hundred twenty-one".