6199812 has 18 divisors (see below), whose sum is σ = 15671838. Its totient is φ = 2066592.

The previous prime is 6199807. The next prime is 6199819. The reversal of 6199812 is 2189916.

It can be written as a sum of positive squares in only one way, i.e., 3594816 + 2604996 = 1896^2 + 1614^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 172217 = 6199812 / (6 + 1 + 9 + 9 + 8 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (6199819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86073 + ... + 86144.

Almost surely, 2^6199812 is an apocalyptic number.

It is an amenable number.

6199812 is an abundant number, since it is smaller than the sum of its proper divisors (9472026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6199812 is a wasteful number, since it uses less digits than its factorization.

6199812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172227 (or 172222 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 6199812 is about 2489.9421680031. The cubic root of 6199812 is about 183.7071981384.

The spelling of 6199812 in words is "six million, one hundred ninety-nine thousand, eight hundred twelve".