12145451 has 4 divisors (see below), whose sum is σ = 12263472. Its totient is φ = 12027432.

The previous prime is 12145447. The next prime is 12145453. The reversal of 12145451 is 15454121.

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 12145451 - 2² = 12145447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12145453) 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, 58856 + ... + 59061.

It is an arithmetic number, because the mean of its divisors is an integer number (3065868).

Almost surely, 2^12145451 is an apocalyptic number.

12145451 is a deficient number, since it is larger than the sum of its proper divisors (118021).

12145451 is a wasteful number, since it uses less digits than its factorization.

12145451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118020.

The product of its digits is 800, while the sum is 23.

The square root of 12145451 is about 3485.0324245263. The cubic root of 12145451 is about 229.8641352592.

Adding to 12145451 its reverse (15454121), we get a palindrome (27599572).

The spelling of 12145451 in words is "twelve million, one hundred forty-five thousand, four hundred fifty-one".