12861072 has 80 divisors (see below), whose sum is σ = 42199680. Its totient is φ = 3673728.

The previous prime is 12861059. The next prime is 12861091. The reversal of 12861072 is 27016821.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 898 + ... + 5150.

It is an arithmetic number, because the mean of its divisors is an integer number (527496).

Almost surely, 2^12861072 is an apocalyptic number.

12861072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12861072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21099840).

12861072 is an abundant number, since it is smaller than the sum of its proper divisors (29338608).

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

12861072 is a wasteful number, since it uses less digits than its factorization.

12861072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277 (or 4265 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 12861072 is about 3586.2336789451. The cubic root of 12861072 is about 234.2928614573.

Adding to 12861072 its reverse (27016821), we get a palindrome (39877893).

The spelling of 12861072 in words is "twelve million, eight hundred sixty-one thousand, seventy-two".