12199541 has 4 divisors (see below), whose sum is σ = 12366732. Its totient is φ = 12032352.

The previous prime is 12199531. The next prime is 12199543. The reversal of 12199541 is 14599121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7980625 + 4218916 = 2825^2 + 2054^2 .

It is a cyclic number.

It is not a de Polignac number, because 12199541 - 2¹⁸ = 11937397 is a prime.

It is a super-2 number, since 2×12199541² = 297657601221362, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12199498 and 12199507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12199543) 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 3 ways as a sum of consecutive naturals, for example, 83486 + ... + 83631.

It is an arithmetic number, because the mean of its divisors is an integer number (3091683).

Almost surely, 2^12199541 is an apocalyptic number.

It is an amenable number.

12199541 is a deficient number, since it is larger than the sum of its proper divisors (167191).

12199541 is an equidigital number, since it uses as much as digits as its factorization.

12199541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167190.

The product of its digits is 3240, while the sum is 32.

The square root of 12199541 is about 3492.7841330377. The cubic root of 12199541 is about 230.2048647285.

The spelling of 12199541 in words is "twelve million, one hundred ninety-nine thousand, five hundred forty-one".