12872889 has 6 divisors (see below), whose sum is σ = 18594186. Its totient is φ = 8581920.

The previous prime is 12872887. The next prime is 12872933. The reversal of 12872889 is 98827821.

It is a happy number.

12872889 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7112889 + 5760000 = 2667^2 + 2400^2 .

It is not a de Polignac number, because 12872889 - 2¹ = 12872887 is a prime.

It is a super-2 number, since 2×12872889² = 331422542412642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12872887) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 715152 + ... + 715169.

It is an arithmetic number, because the mean of its divisors is an integer number (3099031).

Almost surely, 2^12872889 is an apocalyptic number.

It is an amenable number.

12872889 is a deficient number, since it is larger than the sum of its proper divisors (5721297).

12872889 is a wasteful number, since it uses less digits than its factorization.

12872889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430327 (or 1430324 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 12872889 is about 3587.8808508645. The cubic root of 12872889 is about 234.3645970849.

The spelling of 12872889 in words is "twelve million, eight hundred seventy-two thousand, eight hundred eighty-nine".