12285491 has 4 divisors (see below), whose sum is σ = 12317952. Its totient is φ = 12253032.

The previous prime is 12285479. The next prime is 12285503. The reversal of 12285491 is 19458221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19458221 = 1123 ⋅17327.

It is an interprime number because it is at equal distance from previous prime (12285479) and next prime (12285503).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12285491 is a prime.

It is a super-2 number, since 2×12285491² = 301866578222162, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12285421) 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, 15656 + ... + 16421.

It is an arithmetic number, because the mean of its divisors is an integer number (3079488).

Almost surely, 2^12285491 is an apocalyptic number.

12285491 is a deficient number, since it is larger than the sum of its proper divisors (32461).

12285491 is an equidigital number, since it uses as much as digits as its factorization.

12285491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32460.

The product of its digits is 5760, while the sum is 32.

The square root of 12285491 is about 3505.0664758318. The cubic root of 12285491 is about 230.7442244328.

The spelling of 12285491 in words is "twelve million, two hundred eighty-five thousand, four hundred ninety-one".