10521425 has 6 divisors (see below), whose sum is σ = 13046598. Its totient is φ = 8417120.

The previous prime is 10521377. The next prime is 10521437. The reversal of 10521425 is 52412501.

10521425 is digitally balanced in base 3, 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 3 ways, for example, as 49729 + 10471696 = 223^2 + 3236^2 .

It is not a de Polignac number, because 10521425 - 2⁶ = 10521361 is a prime.

It is a super-2 number, since 2×10521425² = 221400768061250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10521397 and 10521406.

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, 210404 + ... + 210453.

It is an arithmetic number, because the mean of its divisors is an integer number (2174433).

Almost surely, 2^10521425 is an apocalyptic number.

It is an amenable number.

10521425 is a deficient number, since it is larger than the sum of its proper divisors (2525173).

10521425 is an equidigital number, since it uses as much as digits as its factorization.

10521425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420867 (or 420862 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 10521425 is about 3243.6746137675. The cubic root of 10521425 is about 219.1247942162.

Adding to 10521425 its reverse (52412501), we get a palindrome (62933926).

The spelling of 10521425 in words is "ten million, five hundred twenty-one thousand, four hundred twenty-five".