12729454 has 4 divisors (see below), whose sum is σ = 19094184. Its totient is φ = 6364726.

The previous prime is 12729439. The next prime is 12729491. The reversal of 12729454 is 45492721.

12729454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3182362 + ... + 3182365.

It is an arithmetic number, because the mean of its divisors is an integer number (4773546).

Almost surely, 2^12729454 is an apocalyptic number.

12729454 is a deficient number, since it is larger than the sum of its proper divisors (6364730).

12729454 is an equidigital number, since it uses as much as digits as its factorization.

12729454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6364729.

The product of its digits is 20160, while the sum is 34.

The square root of 12729454 is about 3567.8360388336. The cubic root of 12729454 is about 233.4908818067.

The spelling of 12729454 in words is "twelve million, seven hundred twenty-nine thousand, four hundred fifty-four".