6581412 has 84 divisors (see below), whose sum is σ = 18025756. Its totient is φ = 2099520.

The previous prime is 6581401. The next prime is 6581413. The reversal of 6581412 is 2141856.

6581412 is a `hidden beast` number, since 658 + 1 + 4 + 1 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2802276 + 3779136 = 1674^2 + 1944^2 .

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

It is an alternating number because its digits alternate between even and odd.

Its product of digits (1920) is a multiple of the sum of its prime factors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6581413) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 107862 + ... + 107922.

Almost surely, 2^6581412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6581412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9012878).

6581412 is an abundant number, since it is smaller than the sum of its proper divisors (11444344).

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

6581412 is a wasteful number, since it uses less digits than its factorization.

6581412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 103 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 6581412 is about 2565.4262803675. The cubic root of 6581412 is about 187.4014842472.

The spelling of 6581412 in words is "six million, five hundred eighty-one thousand, four hundred twelve".