10061721 has 12 divisors (see below), whose sum is σ = 14678820. Its totient is φ = 6640800.

The previous prime is 10061719. The next prime is 10061729. The reversal of 10061721 is 12716001.

10061721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5588496 + 4473225 = 2364^2 + 2115^2 .

It is not a de Polignac number, because 10061721 - 2¹ = 10061719 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10061694 and 10061703.

It is not an unprimeable number, because it can be changed into a prime (10061729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4626 + ... + 6443.

It is an arithmetic number, because the mean of its divisors is an integer number (1223235).

Almost surely, 2^10061721 is an apocalyptic number.

It is an amenable number.

10061721 is a deficient number, since it is larger than the sum of its proper divisors (4617099).

10061721 is a wasteful number, since it uses less digits than its factorization.

10061721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11176 (or 11173 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 10061721 is about 3172.0215951346. The cubic root of 10061721 is about 215.8858064090.

Adding to 10061721 its reverse (12716001), we get a palindrome (22777722).

The spelling of 10061721 in words is "ten million, sixty-one thousand, seven hundred twenty-one".