10821725 has 6 divisors (see below), whose sum is σ = 13418970. Its totient is φ = 8657360.

The previous prime is 10821719. The next prime is 10821757. The reversal of 10821725 is 52712801.

It can be written as a sum of positive squares in 3 ways, for example, as 2948089 + 7873636 = 1717^2 + 2806^2 .

It is not a de Polignac number, because 10821725 - 2⁴ = 10821709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10821694 and 10821703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216410 + ... + 216459.

It is an arithmetic number, because the mean of its divisors is an integer number (2236495).

Almost surely, 2^10821725 is an apocalyptic number.

It is an amenable number.

10821725 is a deficient number, since it is larger than the sum of its proper divisors (2597245).

10821725 is an equidigital number, since it uses as much as digits as its factorization.

10821725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432879 (or 432874 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 10821725 is about 3289.6390379493. The cubic root of 10821725 is about 221.1900046932.

The spelling of 10821725 in words is "ten million, eight hundred twenty-one thousand, seven hundred twenty-five".