12900550 has 48 divisors (see below), whose sum is σ = 26248320. Its totient is φ = 4688640.

The previous prime is 12900541. The next prime is 12900551. The reversal of 12900550 is 5500921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12900551) 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 23 ways as a sum of consecutive naturals, for example, 57739 + ... + 57961.

It is an arithmetic number, because the mean of its divisors is an integer number (546840).

Almost surely, 2^12900550 is an apocalyptic number.

12900550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12900550 is an abundant number, since it is smaller than the sum of its proper divisors (13347770).

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

12900550 is a wasteful number, since it uses less digits than its factorization.

12900550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 12900550 is about 3591.7335647289. The cubic root of 12900550 is about 234.5323429399.

The spelling of 12900550 in words is "twelve million, nine hundred thousand, five hundred fifty".