12508400 has 30 divisors (see below), whose sum is σ = 30052392. Its totient is φ = 5003200.

The previous prime is 12508373. The next prime is 12508409. The reversal of 12508400 is 480521.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12508409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15236 + ... + 16035.

Almost surely, 2^12508400 is an apocalyptic number.

12508400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12508400 is an abundant number, since it is smaller than the sum of its proper divisors (17543992).

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

12508400 is a wasteful number, since it uses less digits than its factorization.

12508400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31289 (or 31278 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 12508400 is about 3536.7216458183. The cubic root of 12508400 is about 232.1314158351.

Adding to 12508400 its reverse (480521), we get a palindrome (12988921).

The spelling of 12508400 in words is "twelve million, five hundred eight thousand, four hundred".