12199539 has 16 divisors (see below), whose sum is σ = 18679680. Its totient is φ = 7004160.

The previous prime is 12199531. The next prime is 12199543. The reversal of 12199539 is 93599121.

It is not a de Polignac number, because 12199539 - 2³ = 12199531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12199497 and 12199506.

It is not an unprimeable number, because it can be changed into a prime (12199531) 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 15 ways as a sum of consecutive naturals, for example, 9102 + ... + 10355.

It is an arithmetic number, because the mean of its divisors is an integer number (1167480).

Almost surely, 2^12199539 is an apocalyptic number.

12199539 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12199539 is a deficient number, since it is larger than the sum of its proper divisors (6480141).

12199539 is a wasteful number, since it uses less digits than its factorization.

12199539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19490.

The product of its digits is 21870, while the sum is 39.

The square root of 12199539 is about 3492.7838467331. The cubic root of 12199539 is about 230.2048521485.

The spelling of 12199539 in words is "twelve million, one hundred ninety-nine thousand, five hundred thirty-nine".