12909550 has 48 divisors (see below), whose sum is σ = 25712640. Its totient is φ = 4808160.

The previous prime is 12909527. The next prime is 12909551. The reversal of 12909550 is 5590921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12909551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101587 + ... + 101713.

It is an arithmetic number, because the mean of its divisors is an integer number (535680).

Almost surely, 2^12909550 is an apocalyptic number.

12909550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12909550 is a deficient number, since it is larger than the sum of its proper divisors (12803090).

12909550 is a wasteful number, since it uses less digits than its factorization.

12909550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 12909550 is about 3592.9862231854. The cubic root of 12909550 is about 234.5868703416.

The spelling of 12909550 in words is "twelve million, nine hundred nine thousand, five hundred fifty".