10221725 has 6 divisors (see below), whose sum is σ = 12674970. Its totient is φ = 8177360.

The previous prime is 10221713. The next prime is 10221727. The reversal of 10221725 is 52712201.

It can be written as a sum of positive squares in 3 ways, for example, as 217156 + 10004569 = 466^2 + 3163^2 .

It is not a de Polignac number, because 10221725 - 2⁸ = 10221469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10221697 and 10221706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204410 + ... + 204459.

It is an arithmetic number, because the mean of its divisors is an integer number (2112495).

Almost surely, 2^10221725 is an apocalyptic number.

It is an amenable number.

10221725 is a deficient number, since it is larger than the sum of its proper divisors (2453245).

10221725 is an equidigital number, since it uses as much as digits as its factorization.

10221725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408879 (or 408874 counting only the distinct ones).

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

The square root of 10221725 is about 3197.1432560960. The cubic root of 10221725 is about 217.0241501575.

Adding to 10221725 its reverse (52712201), we get a palindrome (62933926).

The spelling of 10221725 in words is "ten million, two hundred twenty-one thousand, seven hundred twenty-five".