12180451 has 4 divisors (see below), whose sum is σ = 12317400. Its totient is φ = 12043504.

The previous prime is 12180401. The next prime is 12180461. The reversal of 12180451 is 15408121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12180451 - 2⁷ = 12180323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12180401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68341 + ... + 68518.

It is an arithmetic number, because the mean of its divisors is an integer number (3079350).

Almost surely, 2^12180451 is an apocalyptic number.

12180451 is a deficient number, since it is larger than the sum of its proper divisors (136949).

12180451 is an equidigital number, since it uses as much as digits as its factorization.

12180451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136948.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 12180451 is about 3490.0502861707. The cubic root of 12180451 is about 230.0847261891.

Adding to 12180451 its reverse (15408121), we get a palindrome (27588572).

The spelling of 12180451 in words is "twelve million, one hundred eighty thousand, four hundred fifty-one".