12125418 has 32 divisors (see below), whose sum is σ = 25123776. Its totient is φ = 3898368.

The previous prime is 12125417. The next prime is 12125419. The reversal of 12125418 is 81452121.

It is an interprime number because it is at equal distance from previous prime (12125417) and next prime (12125419).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12125413) 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 15 ways as a sum of consecutive naturals, for example, 42705 + ... + 42987.

It is an arithmetic number, because the mean of its divisors is an integer number (785118).

Almost surely, 2^12125418 is an apocalyptic number.

12125418 is an abundant number, since it is smaller than the sum of its proper divisors (12998358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12125418 is a wasteful number, since it uses less digits than its factorization.

12125418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518.

The product of its digits is 640, while the sum is 24.

The square root of 12125418 is about 3482.1570900808. The cubic root of 12125418 is about 229.7376845594.

Adding to 12125418 its reverse (81452121), we get a palindrome (93577539).

The spelling of 12125418 in words is "twelve million, one hundred twenty-five thousand, four hundred eighteen".