12145400 has 24 divisors (see below), whose sum is σ = 28238520. Its totient is φ = 4858080.

The previous prime is 12145387. The next prime is 12145417. The reversal of 12145400 is 454121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30164 + ... + 30563.

It is an arithmetic number, because the mean of its divisors is an integer number (1176605).

Almost surely, 2^12145400 is an apocalyptic number.

12145400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12145400 is an abundant number, since it is smaller than the sum of its proper divisors (16093120).

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

12145400 is a wasteful number, since it uses less digits than its factorization.

12145400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60743 (or 60734 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12145400 is about 3485.0251075136. The cubic root of 12145400 is about 229.8638135177.

Adding to 12145400 its reverse (454121), we get a palindrome (12599521).

The spelling of 12145400 in words is "twelve million, one hundred forty-five thousand, four hundred".