12198537 has 24 divisors (see below), whose sum is σ = 20094984. Its totient is φ = 7064064.

The previous prime is 12198509. The next prime is 12198539. The reversal of 12198537 is 73589121.

It can be written as a sum of positive squares in 4 ways, for example, as 4447881 + 7750656 = 2109^2 + 2784^2 .

It is not a de Polignac number, because 12198537 - 2⁸ = 12198281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12198539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1078 + ... + 5055.

It is an arithmetic number, because the mean of its divisors is an integer number (837291).

Almost surely, 2^12198537 is an apocalyptic number.

12198537 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12198537 is a deficient number, since it is larger than the sum of its proper divisors (7896447).

12198537 is a wasteful number, since it uses less digits than its factorization.

12198537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6169 (or 6166 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 12198537 is about 3492.6404051949. The cubic root of 12198537 is about 230.1985494082.

The spelling of 12198537 in words is "twelve million, one hundred ninety-eight thousand, five hundred thirty-seven".