12900549 has 4 divisors (see below), whose sum is σ = 17200736. Its totient is φ = 8600364.

The previous prime is 12900541. The next prime is 12900551. The reversal of 12900549 is 94500921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12900549 - 2³ = 12900541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12900541) 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 3 ways as a sum of consecutive naturals, for example, 2150089 + ... + 2150094.

It is an arithmetic number, because the mean of its divisors is an integer number (4300184).

Almost surely, 2^12900549 is an apocalyptic number.

It is an amenable number.

12900549 is a deficient number, since it is larger than the sum of its proper divisors (4300187).

12900549 is an equidigital number, since it uses as much as digits as its factorization.

12900549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300186.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 12900549 is about 3591.7334255203. The cubic root of 12900549 is about 234.5323368799.

The spelling of 12900549 in words is "twelve million, nine hundred thousand, five hundred forty-nine".