12195557 has 8 divisors (see below), whose sum is σ = 13329792. Its totient is φ = 11065600.

The previous prime is 12195553. The next prime is 12195559. The reversal of 12195557 is 75559121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12195557 - 2² = 12195553 is a prime.

It is a super-2 number, since 2×12195557² = 297463221080498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12195553) 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 7 ways as a sum of consecutive naturals, for example, 9413 + ... + 10629.

It is an arithmetic number, because the mean of its divisors is an integer number (1666224).

Almost surely, 2^12195557 is an apocalyptic number.

It is an amenable number.

12195557 is a deficient number, since it is larger than the sum of its proper divisors (1134235).

12195557 is a wasteful number, since it uses less digits than its factorization.

12195557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139.

The product of its digits is 15750, while the sum is 35.

The square root of 12195557 is about 3492.2137677983. The cubic root of 12195557 is about 230.1798026917.

It can be divided in two parts, 1219 and 5557, that added together give a palindrome (6776).

The spelling of 12195557 in words is "twelve million, one hundred ninety-five thousand, five hundred fifty-seven".