12545977 has 4 divisors (see below), whose sum is σ = 12566016. Its totient is φ = 12525940.

The previous prime is 12545963. The next prime is 12545987. The reversal of 12545977 is 77954521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12545977 - 2¹¹ = 12543929 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12545927) 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, 9049 + ... + 10342.

It is an arithmetic number, because the mean of its divisors is an integer number (3141504).

Almost surely, 2^12545977 is an apocalyptic number.

It is an amenable number.

12545977 is a deficient number, since it is larger than the sum of its proper divisors (20039).

12545977 is an equidigital number, since it uses as much as digits as its factorization.

12545977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20038.

The product of its digits is 88200, while the sum is 40.

The square root of 12545977 is about 3542.0300676307. The cubic root of 12545977 is about 232.3636353015.

The spelling of 12545977 in words is "twelve million, five hundred forty-five thousand, nine hundred seventy-seven".