12125531 has 12 divisors (see below), whose sum is σ = 13910736. Its totient is φ = 10541520.

The previous prime is 12125521. The next prime is 12125543. The reversal of 12125531 is 13552121.

It is a happy number.

12125531 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12125531 - 2⁶ = 12125467 is a prime.

It is a super-2 number, since 2×12125531² = 294057004063922, which contains 22 as substring.

It is a Duffinian number.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 605 + ... + 4961.

It is an arithmetic number, because the mean of its divisors is an integer number (1159228).

Almost surely, 2^12125531 is an apocalyptic number.

12125531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12125531 is a deficient number, since it is larger than the sum of its proper divisors (1785205).

12125531 is a wasteful number, since it uses less digits than its factorization.

12125531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4402 (or 4391 counting only the distinct ones).

The product of its digits is 300, while the sum is 20.

The square root of 12125531 is about 3482.1733156177. The cubic root of 12125531 is about 229.7383982194.

Adding to 12125531 its reverse (13552121), we get a palindrome (25677652).

It can be divided in two parts, 121 and 25531, that added together give a palindrome (25652).

The spelling of 12125531 in words is "twelve million, one hundred twenty-five thousand, five hundred thirty-one".