12522281 has 8 divisors (see below), whose sum is σ = 13106880. Its totient is φ = 11941072.

The previous prime is 12522277. The next prime is 12522329. The reversal of 12522281 is 18222521.

12522281 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12522281 - 2² = 12522277 is a prime.

It is a super-2 number, since 2×12522281² = 313615042885922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12522221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9575 + ... + 10803.

It is an arithmetic number, because the mean of its divisors is an integer number (1638360).

Almost surely, 2^12522281 is an apocalyptic number.

It is an amenable number.

12522281 is a deficient number, since it is larger than the sum of its proper divisors (584599).

12522281 is a wasteful number, since it uses less digits than its factorization.

12522281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695.

The product of its digits is 640, while the sum is 23.

The square root of 12522281 is about 3538.6835122684. The cubic root of 12522281 is about 232.2172521526.

The spelling of 12522281 in words is "twelve million, five hundred twenty-two thousand, two hundred eighty-one".