12009455 has 4 divisors (see below), whose sum is σ = 14411352. Its totient is φ = 9607560.

The previous prime is 12009443. The next prime is 12009469. The reversal of 12009455 is 55490021.

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

It is not a de Polignac number, because 12009455 - 2⁸ = 12009199 is a prime.

It is a super-3 number, since 3×12009455³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1200941 + ... + 1200950.

It is an arithmetic number, because the mean of its divisors is an integer number (3602838).

Almost surely, 2^12009455 is an apocalyptic number.

12009455 is a deficient number, since it is larger than the sum of its proper divisors (2401897).

12009455 is an equidigital number, since it uses as much as digits as its factorization.

12009455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401896.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 12009455 is about 3465.4660581226. The cubic root of 12009455 is about 229.0029620206.

Adding to 12009455 its reverse (55490021), we get a palindrome (67499476).

The spelling of 12009455 in words is "twelve million, nine thousand, four hundred fifty-five".