12281136 has 40 divisors (see below), whose sum is σ = 36259584. Its totient is φ = 3508800.

The previous prime is 12281131. The next prime is 12281141. The reversal of 12281136 is 63118221.

12281136 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12281131) and next prime (12281141).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12281131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17940 + ... + 18611.

Almost surely, 2^12281136 is an apocalyptic number.

12281136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12281136 is an abundant number, since it is smaller than the sum of its proper divisors (23978448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12281136 is a wasteful number, since it uses less digits than its factorization.

12281136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36569 (or 36563 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 12281136 is about 3504.4451772000. The cubic root of 12281136 is about 230.7169562279.

Adding to 12281136 its reverse (63118221), we get a palindrome (75399357).

The spelling of 12281136 in words is "twelve million, two hundred eighty-one thousand, one hundred thirty-six".