12125561 has 8 divisors (see below), whose sum is σ = 13988160. Its totient is φ = 10295568.

The previous prime is 12125551. The next prime is 12125563. The reversal of 12125561 is 16552121.

It is a happy number.

12125561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12125561 - 2⁶ = 12125497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12125563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7346 + ... + 8843.

It is an arithmetic number, because the mean of its divisors is an integer number (1748520).

Almost surely, 2^12125561 is an apocalyptic number.

It is an amenable number.

12125561 is a deficient number, since it is larger than the sum of its proper divisors (1862599).

12125561 is a wasteful number, since it uses less digits than its factorization.

12125561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16303.

The product of its digits is 600, while the sum is 23.

The square root of 12125561 is about 3482.1776232697. The cubic root of 12125561 is about 229.7385876859.

Adding to 12125561 its reverse (16552121), we get a palindrome (28677682).

The spelling of 12125561 in words is "twelve million, one hundred twenty-five thousand, five hundred sixty-one".