12345511 has 2 divisors, whose sum is σ = 12345512. Its totient is φ = 12345510.

The previous prime is 12345499. The next prime is 12345517. The reversal of 12345511 is 11554321.

It is a happy number.

12345511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (11554321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12345511 - 2⁵ = 12345479 is a prime.

It is a super-2 number, since 2×12345511² = 304823283702242, which contains 22 as substring.

It is equal to p₈₀₉₂₁₂ and since 12345511 and 809212 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12345517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6172755 + 6172756.

It is an arithmetic number, because the mean of its divisors is an integer number (6172756).

Almost surely, 2^12345511 is an apocalyptic number.

12345511 is a deficient number, since it is larger than the sum of its proper divisors (1).

12345511 is an equidigital number, since it uses as much as digits as its factorization.

12345511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 22.

The square root of 12345511 is about 3513.6179359743. The cubic root of 12345511 is about 231.1193763395.

Adding to 12345511 its reverse (11554321), we get a palindrome (23899832).

The spelling of 12345511 in words is "twelve million, three hundred forty-five thousand, five hundred eleven".