12125810 has 16 divisors (see below), whose sum is σ = 21917952. Its totient is φ = 4830000.

The previous prime is 12125809. The next prime is 12125837. The reversal of 12125810 is 1852121.

It is a happy number.

It is a super-2 number, since 2×12125810² = 294070536312200, which contains 22 as substring.

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

It is a Curzon number.

It is an unprimeable number.

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, 95 + ... + 4925.

It is an arithmetic number, because the mean of its divisors is an integer number (1369872).

Almost surely, 2^12125810 is an apocalyptic number.

12125810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12125810 is a deficient number, since it is larger than the sum of its proper divisors (9792142).

12125810 is a wasteful number, since it uses less digits than its factorization.

12125810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5089.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 12125810 is about 3482.2133765753. The cubic root of 12125810 is about 229.7401602459.

Adding to 12125810 its reverse (1852121), we get a palindrome (13977931).

The spelling of 12125810 in words is "twelve million, one hundred twenty-five thousand, eight hundred ten".