12521853 has 6 divisors (see below), whose sum is σ = 18087134. Its totient is φ = 8347896.

The previous prime is 12521837. The next prime is 12521857. The reversal of 12521853 is 35812521.

It is a happy number.

12521853 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 only one way, i.e., 10771524 + 1750329 = 3282^2 + 1323^2 .

It is not a de Polignac number, because 12521853 - 2⁴ = 12521837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521857) 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, 695650 + ... + 695667.

Almost surely, 2^12521853 is an apocalyptic number.

It is an amenable number.

12521853 is a deficient number, since it is larger than the sum of its proper divisors (5565281).

12521853 is a wasteful number, since it uses less digits than its factorization.

12521853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391323 (or 1391320 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 12521853 is about 3538.6230372844. The cubic root of 12521853 is about 232.2146064654.

The spelling of 12521853 in words is "twelve million, five hundred twenty-one thousand, eight hundred fifty-three".