12905400 has 96 divisors (see below), whose sum is σ = 40555440. Its totient is φ = 3394560.

The previous prime is 12905381. The next prime is 12905407. The reversal of 12905400 is 450921.

12905400 = T₁₁₅ + T₁₁₆ + ... + T₄₂₈.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12905407) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 82122 + ... + 82278.

Almost surely, 2^12905400 is an apocalyptic number.

12905400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12905400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20277720).

12905400 is an abundant number, since it is smaller than the sum of its proper divisors (27650040).

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

12905400 is a wasteful number, since it uses less digits than its factorization.

12905400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 12905400 is about 3592.4086627220. The cubic root of 12905400 is about 234.5617303006.

The spelling of 12905400 in words is "twelve million, nine hundred five thousand, four hundred".