12496581 has 12 divisors (see below), whose sum is σ = 19112652. Its totient is φ = 7840896.

The previous prime is 12496529. The next prime is 12496591. The reversal of 12496581 is 18569421.

12496581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7049025 + 5447556 = 2655^2 + 2334^2 .

It is not a de Polignac number, because 12496581 - 2¹³ = 12488389 is a prime.

It is a super-2 number, since 2×12496581² = 312329073379122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12496591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40686 + ... + 40991.

It is an arithmetic number, because the mean of its divisors is an integer number (1592721).

Almost surely, 2^12496581 is an apocalyptic number.

It is an amenable number.

12496581 is a deficient number, since it is larger than the sum of its proper divisors (6616071).

12496581 is a wasteful number, since it uses less digits than its factorization.

12496581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81700 (or 81697 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 12496581 is about 3535.0503532482. The cubic root of 12496581 is about 232.0582802949.

The spelling of 12496581 in words is "twelve million, four hundred ninety-six thousand, five hundred eighty-one".