12723451 has 4 divisors (see below), whose sum is σ = 13702192. Its totient is φ = 11744712.

The previous prime is 12723443. The next prime is 12723457. The reversal of 12723451 is 15432721.

It is a happy number.

12723451 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 a cyclic number.

It is not a de Polignac number, because 12723451 - 2³ = 12723443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12723457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489351 + ... + 489376.

It is an arithmetic number, because the mean of its divisors is an integer number (3425548).

Almost surely, 2^12723451 is an apocalyptic number.

12723451 is a deficient number, since it is larger than the sum of its proper divisors (978741).

12723451 is an equidigital number, since it uses as much as digits as its factorization.

12723451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978740.

The product of its digits is 1680, while the sum is 25.

The square root of 12723451 is about 3566.9946733910. The cubic root of 12723451 is about 233.4541725561.

The spelling of 12723451 in words is "twelve million, seven hundred twenty-three thousand, four hundred fifty-one".