12547897 has 4 divisors (see below), whose sum is σ = 12719860. Its totient is φ = 12375936.

The previous prime is 12547891. The next prime is 12547933. The reversal of 12547897 is 79874521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79874521 = 43 ⋅1857547.

It can be written as a sum of positive squares in 2 ways, for example, as 7458361 + 5089536 = 2731^2 + 2256^2 .

It is a cyclic number.

It is not a de Polignac number, because 12547897 - 2²³ = 4159289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12547891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85872 + ... + 86017.

It is an arithmetic number, because the mean of its divisors is an integer number (3179965).

Almost surely, 2^12547897 is an apocalyptic number.

It is an amenable number.

12547897 is a deficient number, since it is larger than the sum of its proper divisors (171963).

12547897 is an equidigital number, since it uses as much as digits as its factorization.

12547897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171962.

The product of its digits is 141120, while the sum is 43.

The square root of 12547897 is about 3542.3010882758. The cubic root of 12547897 is about 232.3754881162.

The spelling of 12547897 in words is "twelve million, five hundred forty-seven thousand, eight hundred ninety-seven".