12180355 has 8 divisors (see below), whose sum is σ = 15945264. Its totient is φ = 8858400.

The previous prime is 12180341. The next prime is 12180359. The reversal of 12180355 is 55308121.

It is a happy number.

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

It is not a de Polignac number, because 12180355 - 2⁵ = 12180323 is a prime.

It is a super-2 number, since 2×12180355² = 296722095852050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12180359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110676 + ... + 110785.

It is an arithmetic number, because the mean of its divisors is an integer number (1993158).

Almost surely, 2^12180355 is an apocalyptic number.

12180355 is a deficient number, since it is larger than the sum of its proper divisors (3764909).

12180355 is a wasteful number, since it uses less digits than its factorization.

12180355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221477.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 12180355 is about 3490.0365327601. The cubic root of 12180355 is about 230.0841217180.

Adding to 12180355 its reverse (55308121), we get a palindrome (67488476).

The spelling of 12180355 in words is "twelve million, one hundred eighty thousand, three hundred fifty-five".