12761563 has 4 divisors (see below), whose sum is σ = 12768760. Its totient is φ = 12754368.

The previous prime is 12761561. The next prime is 12761591. The reversal of 12761563 is 36516721.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12761563 - 2¹ = 12761561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12761561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1156 + ... + 5182.

It is an arithmetic number, because the mean of its divisors is an integer number (3192190).

Almost surely, 2^12761563 is an apocalyptic number.

12761563 is a deficient number, since it is larger than the sum of its proper divisors (7197).

12761563 is an equidigital number, since it uses as much as digits as its factorization.

12761563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7196.

The product of its digits is 7560, while the sum is 31.

The square root of 12761563 is about 3572.3329911978. The cubic root of 12761563 is about 233.6870374807.

The spelling of 12761563 in words is "twelve million, seven hundred sixty-one thousand, five hundred sixty-three".