12040451 has 4 divisors (see below), whose sum is σ = 12072600. Its totient is φ = 12008304.

The previous prime is 12040421. The next prime is 12040463. The reversal of 12040451 is 15404021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15404021 = 197 ⋅78193.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12040451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12040421) 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 3 ways as a sum of consecutive naturals, for example, 15506 + ... + 16263.

It is an arithmetic number, because the mean of its divisors is an integer number (3018150).

Almost surely, 2^12040451 is an apocalyptic number.

12040451 is a deficient number, since it is larger than the sum of its proper divisors (32149).

12040451 is an equidigital number, since it uses as much as digits as its factorization.

12040451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32148.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12040451 is about 3469.9353019905. The cubic root of 12040451 is about 229.1998090836.

Adding to 12040451 its reverse (15404021), we get a palindrome (27444472).

The spelling of 12040451 in words is "twelve million, forty thousand, four hundred fifty-one".