12721254 has 64 divisors (see below), whose sum is σ = 32707584. Its totient is φ = 3206016.

The previous prime is 12721217. The next prime is 12721271. The reversal of 12721254 is 45212721.

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 in 31 ways as a sum of consecutive naturals, for example, 12052 + ... + 13064.

It is an arithmetic number, because the mean of its divisors is an integer number (511056).

Almost surely, 2^12721254 is an apocalyptic number.

12721254 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12721254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16353792).

12721254 is an abundant number, since it is smaller than the sum of its proper divisors (19986330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12721254 is a wasteful number, since it uses less digits than its factorization.

12721254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061.

The product of its digits is 1120, while the sum is 24.

The square root of 12721254 is about 3566.6866977631. The cubic root of 12721254 is about 233.4407346835.

Adding to 12721254 its reverse (45212721), we get a palindrome (57933975).

The spelling of 12721254 in words is "twelve million, seven hundred twenty-one thousand, two hundred fifty-four".