12506281 has 6 divisors (see below), whose sum is σ = 12718446. Its totient is φ = 12297600.

The previous prime is 12506269. The next prime is 12506303. The reversal of 12506281 is 18260521.

It can be written as a sum of positive squares in 3 ways, for example, as 80656 + 12425625 = 284^2 + 3525^2 .

It is not a de Polignac number, because 12506281 - 2⁹ = 12505769 is a prime.

It is a super-2 number, since 2×12506281² = 312814128901922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12506381) 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, 2041 + ... + 5401.

It is an arithmetic number, because the mean of its divisors is an integer number (2119741).

Almost surely, 2^12506281 is an apocalyptic number.

It is an amenable number.

12506281 is a deficient number, since it is larger than the sum of its proper divisors (212165).

12506281 is an frugal number, since it uses more digits than its factorization.

12506281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483 (or 3422 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 12506281 is about 3536.4220619151. The cubic root of 12506281 is about 232.1183069310.

The spelling of 12506281 in words is "twelve million, five hundred six thousand, two hundred eighty-one".