12489885 has 24 divisors (see below), whose sum is σ = 21732984. Its totient is φ = 6635520.

The previous prime is 12489877. The next prime is 12489899. The reversal of 12489885 is 58898421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1340964 + 11148921 = 1158^2 + 3339^2 .

It is not a de Polignac number, because 12489885 - 2³ = 12489877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12489885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19165 + ... + 19805.

It is an arithmetic number, because the mean of its divisors is an integer number (905541).

Almost surely, 2^12489885 is an apocalyptic number.

12489885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12489885 is a deficient number, since it is larger than the sum of its proper divisors (9243099).

12489885 is a wasteful number, since it uses less digits than its factorization.

12489885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085 (or 1082 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 12489885 is about 3534.1031394118. The cubic root of 12489885 is about 232.0168252265.

It can be divided in two parts, 124 and 89885, that added together give a palindrome (90009).

The spelling of 12489885 in words is "twelve million, four hundred eighty-nine thousand, eight hundred eighty-five".