10548721 has 8 divisors (see below), whose sum is σ = 11554920. Its totient is φ = 9585408.

The previous prime is 10548701. The next prime is 10548751. The reversal of 10548721 is 12784501.

It can be written as a sum of positive squares in 4 ways, for example, as 6305121 + 4243600 = 2511^2 + 2060^2 .

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 10548721 - 2⁵ = 10548689 is a prime.

It is a super-2 number, since 2×10548721² = 222551029471682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10548721.

It is not an unprimeable number, because it can be changed into a prime (10548701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10206 + ... + 11191.

It is an arithmetic number, because the mean of its divisors is an integer number (1444365).

Almost surely, 2^10548721 is an apocalyptic number.

It is an amenable number.

10548721 is a deficient number, since it is larger than the sum of its proper divisors (1006199).

10548721 is a wasteful number, since it uses less digits than its factorization.

10548721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21443.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 10548721 is about 3247.8794620490. The cubic root of 10548721 is about 219.3141242548.

The spelling of 10548721 in words is "ten million, five hundred forty-eight thousand, seven hundred twenty-one".