12522287 has 4 divisors (see below), whose sum is σ = 12954120. Its totient is φ = 12090456.

The previous prime is 12522277. The next prime is 12522329. The reversal of 12522287 is 78222521.

12522287 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78222521 = 13 ⋅6017117.

It is a cyclic number.

It is not a de Polignac number, because 12522287 - 2⁴ = 12522271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 431803 = 12522287 / (1 + 2 + 5 + 2 + 2 + 2 + 8 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12522227) 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, 215873 + ... + 215930.

It is an arithmetic number, because the mean of its divisors is an integer number (3238530).

Almost surely, 2^12522287 is an apocalyptic number.

12522287 is a deficient number, since it is larger than the sum of its proper divisors (431833).

12522287 is an equidigital number, since it uses as much as digits as its factorization.

12522287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431832.

The product of its digits is 4480, while the sum is 29.

The square root of 12522287 is about 3538.6843600412. The cubic root of 12522287 is about 232.2172892413.

The spelling of 12522287 in words is "twelve million, five hundred twenty-two thousand, two hundred eighty-seven".