12581432 has 8 divisors (see below), whose sum is σ = 23590200. Its totient is φ = 6290712.

The previous prime is 12581431. The next prime is 12581441. The reversal of 12581432 is 23418521.

It is a tau number, because it is divible by the number of its divisors (8).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12581431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 786332 + ... + 786347.

It is an arithmetic number, because the mean of its divisors is an integer number (2948775).

Almost surely, 2^12581432 is an apocalyptic number.

It is an amenable number.

12581432 is a deficient number, since it is larger than the sum of its proper divisors (11008768).

12581432 is a wasteful number, since it uses less digits than its factorization.

12581432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572685 (or 1572681 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 12581432 is about 3547.0314348762. The cubic root of 12581432 is about 232.5823164031.

Adding to 12581432 its reverse (23418521), we get a palindrome (35999953).

The spelling of 12581432 in words is "twelve million, five hundred eighty-one thousand, four hundred thirty-two".