12481577 has 4 divisors (see below), whose sum is σ = 12535380. Its totient is φ = 12427776.

The previous prime is 12481559. The next prime is 12481619. The reversal of 12481577 is 77518421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1860496 + 10621081 = 1364^2 + 3259^2 .

It is a cyclic number.

It is not a de Polignac number, because 12481577 - 2²² = 8287273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12481517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26552 + ... + 27017.

It is an arithmetic number, because the mean of its divisors is an integer number (3133845).

Almost surely, 2^12481577 is an apocalyptic number.

It is an amenable number.

12481577 is a deficient number, since it is larger than the sum of its proper divisors (53803).

12481577 is an equidigital number, since it uses as much as digits as its factorization.

12481577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53802.

The product of its digits is 15680, while the sum is 35.

The square root of 12481577 is about 3532.9275395909. The cubic root of 12481577 is about 231.9653696328.

Adding to 12481577 its reverse (77518421), we get a palindrome (89999998).

The spelling of 12481577 in words is "twelve million, four hundred eighty-one thousand, five hundred seventy-seven".