12724889 has 12 divisors (see below), whose sum is σ = 13601700. Its totient is φ = 11901600.

The previous prime is 12724879. The next prime is 12724897. The reversal of 12724889 is 98842721.

It can be written as a sum of positive squares in 2 ways, for example, as 11055625 + 1669264 = 3325^2 + 1292^2 .

It is not a de Polignac number, because 12724889 - 2¹² = 12720793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12724879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36287 + ... + 36635.

It is an arithmetic number, because the mean of its divisors is an integer number (1133475).

Almost surely, 2^12724889 is an apocalyptic number.

12724889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12724889 is a deficient number, since it is larger than the sum of its proper divisors (876811).

12724889 is a wasteful number, since it uses less digits than its factorization.

12724889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 469 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 12724889 is about 3567.1962379437. The cubic root of 12724889 is about 233.4629671945.

The spelling of 12724889 in words is "twelve million, seven hundred twenty-four thousand, eight hundred eighty-nine".