12125511 has 8 divisors (see below), whose sum is σ = 17963760. Its totient is φ = 8083656.

The previous prime is 12125497. The next prime is 12125521. The reversal of 12125511 is 11552121.

It is not a de Polignac number, because 12125511 - 2⁵ = 12125479 is a prime.

It is a super-2 number, since 2×12125511² = 294056034022242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12125521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224520 + ... + 224573.

It is an arithmetic number, because the mean of its divisors is an integer number (2245470).

Almost surely, 2^12125511 is an apocalyptic number.

12125511 is a deficient number, since it is larger than the sum of its proper divisors (5838249).

12125511 is an equidigital number, since it uses as much as digits as its factorization.

12125511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449102 (or 449096 counting only the distinct ones).

The product of its digits is 100, while the sum is 18.

The square root of 12125511 is about 3482.1704438468. The cubic root of 12125511 is about 229.7382719082.

Adding to 12125511 its reverse (11552121), we get a palindrome (23677632).

The spelling of 12125511 in words is "twelve million, one hundred twenty-five thousand, five hundred eleven".