6198121 has 4 divisors (see below), whose sum is σ = 6221952. Its totient is φ = 6174292.

The previous prime is 6198119. The next prime is 6198131. The reversal of 6198121 is 1218916.

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 a cyclic number.

It is not a de Polignac number, because 6198121 - 2¹ = 6198119 is a prime.

It is a Duffinian number.

6198121 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6198121.

It is not an unprimeable number, because it can be changed into a prime (6198131) 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, 11521 + ... + 12046.

It is an arithmetic number, because the mean of its divisors is an integer number (1555488).

Almost surely, 2^6198121 is an apocalyptic number.

It is an amenable number.

6198121 is a deficient number, since it is larger than the sum of its proper divisors (23831).

6198121 is a wasteful number, since it uses less digits than its factorization.

6198121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23830.

The product of its digits is 864, while the sum is 28.

The square root of 6198121 is about 2489.6025787262. The cubic root of 6198121 is about 183.6904945610.

The spelling of 6198121 in words is "six million, one hundred ninety-eight thousand, one hundred twenty-one".