12521783 has 4 divisors (see below), whose sum is σ = 12532080. Its totient is φ = 12511488.

The previous prime is 12521767. The next prime is 12521797. The reversal of 12521783 is 38712521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12521783 - 2⁴ = 12521767 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 (12521753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3035 + ... + 5852.

It is an arithmetic number, because the mean of its divisors is an integer number (3133020).

Almost surely, 2^12521783 is an apocalyptic number.

12521783 is a deficient number, since it is larger than the sum of its proper divisors (10297).

12521783 is an equidigital number, since it uses as much as digits as its factorization.

12521783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10296.

The product of its digits is 3360, while the sum is 29.

The square root of 12521783 is about 3538.6131464177. The cubic root of 12521783 is about 232.2141737538.

The spelling of 12521783 in words is "twelve million, five hundred twenty-one thousand, seven hundred eighty-three".