10725221 has 4 divisors (see below), whose sum is σ = 11550252. Its totient is φ = 9900192.

The previous prime is 10725191. The next prime is 10725251. The reversal of 10725221 is 12252701.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (10725191) and next prime (10725251).

It can be written as a sum of positive squares in 2 ways, for example, as 5712100 + 5013121 = 2390^2 + 2239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10725221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10725193 and 10725202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10725251) 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 3 ways as a sum of consecutive naturals, for example, 412496 + ... + 412521.

It is an arithmetic number, because the mean of its divisors is an integer number (2887563).

Almost surely, 2^10725221 is an apocalyptic number.

It is an amenable number.

10725221 is a deficient number, since it is larger than the sum of its proper divisors (825031).

10725221 is an equidigital number, since it uses as much as digits as its factorization.

10725221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825030.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 10725221 is about 3274.9383200299. The cubic root of 10725221 is about 220.5305445969.

Adding to 10725221 its reverse (12252701), we get a palindrome (22977922).

The spelling of 10725221 in words is "ten million, seven hundred twenty-five thousand, two hundred twenty-one".