12030491 has 4 divisors (see below), whose sum is σ = 13124184. Its totient is φ = 10936800.

The previous prime is 12030463. The next prime is 12030521. The reversal of 12030491 is 19403021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19403021 = 11 ⋅1763911.

It is a cyclic number.

It is not a de Polignac number, because 12030491 - 2¹⁸ = 11768347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12030451) 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 3 ways as a sum of consecutive naturals, for example, 546830 + ... + 546851.

It is an arithmetic number, because the mean of its divisors is an integer number (3281046).

Almost surely, 2^12030491 is an apocalyptic number.

12030491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12030491 is a deficient number, since it is larger than the sum of its proper divisors (1093693).

12030491 is a wasteful number, since it uses less digits than its factorization.

12030491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093692.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 12030491 is about 3468.4998198068. The cubic root of 12030491 is about 229.1365927404.

It can be divided in two parts, 12030 and 491, that added together give a palindrome (12521).

The spelling of 12030491 in words is "twelve million, thirty thousand, four hundred ninety-one".