12490281 has 20 divisors (see below), whose sum is σ = 19118484. Its totient is φ = 8121600.

The previous prime is 12490273. The next prime is 12490301. The reversal of 12490281 is 18209421.

It can be written as a sum of positive squares in 2 ways, for example, as 2624400 + 9865881 = 1620^2 + 3141^2 .

It is not a de Polignac number, because 12490281 - 2³ = 12490273 is a prime.

It is a super-2 number, since 2×12490281² = 312014238917922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12490781) 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 19 ways as a sum of consecutive naturals, for example, 1441 + ... + 5201.

Almost surely, 2^12490281 is an apocalyptic number.

It is an amenable number.

12490281 is a deficient number, since it is larger than the sum of its proper divisors (6628203).

12490281 is an equidigital number, since it uses as much as digits as its factorization.

12490281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814 (or 3805 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 12490281 is about 3534.1591644973. The cubic root of 12490281 is about 232.0192772824.

The spelling of 12490281 in words is "twelve million, four hundred ninety thousand, two hundred eighty-one".