12125542 has 16 divisors (see below), whose sum is σ = 21368592. Its totient is φ = 5087520.

The previous prime is 12125521. The next prime is 12125543. The reversal of 12125542 is 24552121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12125543) 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, 20913 + ... + 21484.

It is an arithmetic number, because the mean of its divisors is an integer number (1335537).

Almost surely, 2^12125542 is an apocalyptic number.

12125542 is a deficient number, since it is larger than the sum of its proper divisors (9243050).

12125542 is a wasteful number, since it uses less digits than its factorization.

12125542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42423.

The product of its digits is 800, while the sum is 22.

The square root of 12125542 is about 3482.1748950907. The cubic root of 12125542 is about 229.7384676905.

Adding to 12125542 its reverse (24552121), we get a palindrome (36677663).

The spelling of 12125542 in words is "twelve million, one hundred twenty-five thousand, five hundred forty-two".