12545761 has 4 divisors (see below), whose sum is σ = 12563092. Its totient is φ = 12528432.

The previous prime is 12545759. The next prime is 12545773. The reversal of 12545761 is 16754521.

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 8156736 + 4389025 = 2856^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 12545761 - 2¹ = 12545759 is a prime.

It is a super-2 number, since 2×12545761² = 314792238138242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12545261) 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, 7530 + ... + 9043.

It is an arithmetic number, because the mean of its divisors is an integer number (3140773).

Almost surely, 2^12545761 is an apocalyptic number.

It is an amenable number.

12545761 is a deficient number, since it is larger than the sum of its proper divisors (17331).

12545761 is an equidigital number, since it uses as much as digits as its factorization.

12545761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17330.

The product of its digits is 8400, while the sum is 31.

The square root of 12545761 is about 3541.9995765104. Note that the first 3 decimals coincide. The cubic root of 12545761 is about 232.3623017841.

The spelling of 12545761 in words is "twelve million, five hundred forty-five thousand, seven hundred sixty-one".