12761489 has 4 divisors (see below), whose sum is σ = 13743156. Its totient is φ = 11779824.

The previous prime is 12761477. The next prime is 12761503. The reversal of 12761489 is 98416721.

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 4695889 + 8065600 = 2167^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 12761489 - 2⁴ = 12761473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12761459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490814 + ... + 490839.

It is an arithmetic number, because the mean of its divisors is an integer number (3435789).

Almost surely, 2^12761489 is an apocalyptic number.

It is an amenable number.

12761489 is a deficient number, since it is larger than the sum of its proper divisors (981667).

12761489 is an equidigital number, since it uses as much as digits as its factorization.

12761489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981666.

The product of its digits is 24192, while the sum is 38.

The square root of 12761489 is about 3572.3226338056. The cubic root of 12761489 is about 233.6865857891.

It can be divided in two parts, 127 and 61489, that added together give a palindrome (61616).

The spelling of 12761489 in words is "twelve million, seven hundred sixty-one thousand, four hundred eighty-nine".