12849858 has 72 divisors (see below), whose sum is σ = 34332012. Its totient is φ = 3451392.

The previous prime is 12849857. The next prime is 12849869. The reversal of 12849858 is 85894821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10870209 + 1979649 = 3297^2 + 1407^2 .

It is not an unprimeable number, because it can be changed into a prime (12849853) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14566 + ... + 15422.

Almost surely, 2^12849858 is an apocalyptic number.

12849858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12849858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17166006).

12849858 is an abundant number, since it is smaller than the sum of its proper divisors (21482154).

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

12849858 is a wasteful number, since it uses less digits than its factorization.

12849858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896 (or 886 counting only the distinct ones).

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

The square root of 12849858 is about 3584.6698592757. The cubic root of 12849858 is about 234.2247457215.

The spelling of 12849858 in words is "twelve million, eight hundred forty-nine thousand, eight hundred fifty-eight".