12549999 has 32 divisors (see below), whose sum is σ = 21081600. Its totient is φ = 6504960.

The previous prime is 12549913. The next prime is 12550001. The reversal of 12549999 is 99994521.

It is not a de Polignac number, because 12549999 - 2⁷ = 12549871 is a prime.

12549999 is a modest number, since divided by 9999 gives 1254 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12549599) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27727 + ... + 28175.

It is an arithmetic number, because the mean of its divisors is an integer number (658800).

Almost surely, 2^12549999 is an apocalyptic number.

12549999 is a deficient number, since it is larger than the sum of its proper divisors (8531601).

12549999 is an equidigital number, since it uses as much as digits as its factorization.

12549999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 470 counting only the distinct ones).

The product of its digits is 262440, while the sum is 48.

The square root of 12549999 is about 3542.5977756443. The cubic root of 12549999 is about 232.3884630926.

The spelling of 12549999 in words is "twelve million, five hundred forty-nine thousand, nine hundred ninety-nine".