12030511 has 4 divisors (see below), whose sum is σ = 12418624. Its totient is φ = 11642400.

The previous prime is 12030463. The next prime is 12030521. The reversal of 12030511 is 11503021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12030511 - 2⁷ = 12030383 is a prime.

It is a super-2 number, since 2×12030511² = 289466389842242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12030491 and 12030500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12030521) 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, 194010 + ... + 194071.

It is an arithmetic number, because the mean of its divisors is an integer number (3104656).

Almost surely, 2^12030511 is an apocalyptic number.

12030511 is a deficient number, since it is larger than the sum of its proper divisors (388113).

12030511 is an equidigital number, since it uses as much as digits as its factorization.

12030511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388112.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 12030511 is about 3468.5027028965. The cubic root of 12030511 is about 229.1367197158.

Adding to 12030511 its reverse (11503021), we get a palindrome (23533532).

The spelling of 12030511 in words is "twelve million, thirty thousand, five hundred eleven".