12581290 has 16 divisors (see below), whose sum is σ = 22713768. Its totient is φ = 5017536.

The previous prime is 12581269. The next prime is 12581291. The reversal of 12581290 is 9218521.

It can be written as a sum of positive squares in 4 ways, for example, as 12453841 + 127449 = 3529^2 + 357^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12581291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2044 + ... + 5416.

Almost surely, 2^12581290 is an apocalyptic number.

12581290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12581290 is a deficient number, since it is larger than the sum of its proper divisors (10132478).

12581290 is a wasteful number, since it uses less digits than its factorization.

12581290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 12581290 is about 3547.0114180814. The cubic root of 12581290 is about 232.5814413884.

The spelling of 12581290 in words is "twelve million, five hundred eighty-one thousand, two hundred ninety".