12547973 has 4 divisors (see below), whose sum is σ = 12580620. Its totient is φ = 12515328.

The previous prime is 12547957. The next prime is 12547991. The reversal of 12547973 is 37974521.

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 3104644 + 9443329 = 1762^2 + 3073^2 .

It is a cyclic number.

It is not a de Polignac number, because 12547973 - 2⁴ = 12547957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12547933) 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, 15740 + ... + 16517.

It is an arithmetic number, because the mean of its divisors is an integer number (3145155).

Almost surely, 2^12547973 is an apocalyptic number.

It is an amenable number.

12547973 is a deficient number, since it is larger than the sum of its proper divisors (32647).

12547973 is an equidigital number, since it uses as much as digits as its factorization.

12547973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32646.

The product of its digits is 52920, while the sum is 38.

The square root of 12547973 is about 3542.3118157497. The cubic root of 12547973 is about 232.3759572652.

The spelling of 12547973 in words is "twelve million, five hundred forty-seven thousand, nine hundred seventy-three".