12115451 has 4 divisors (see below), whose sum is σ = 12506304. Its totient is φ = 11724600.

The previous prime is 12115421. The next prime is 12115463. The reversal of 12115451 is 15451121.

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 12115451 - 2⁶ = 12115387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12115421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195380 + ... + 195441.

It is an arithmetic number, because the mean of its divisors is an integer number (3126576).

Almost surely, 2^12115451 is an apocalyptic number.

12115451 is a deficient number, since it is larger than the sum of its proper divisors (390853).

12115451 is an equidigital number, since it uses as much as digits as its factorization.

12115451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390852.

The product of its digits is 200, while the sum is 20.

The square root of 12115451 is about 3480.7256427360. The cubic root of 12115451 is about 229.6747197696.

Adding to 12115451 its reverse (15451121), we get a palindrome (27566572).

It can be divided in two parts, 1211 and 5451, that multiplied together give a triangular number (6601161 = T₃₆₃₃).

The spelling of 12115451 in words is "twelve million, one hundred fifteen thousand, four hundred fifty-one".