12555973 has 4 divisors (see below), whose sum is σ = 12592300. Its totient is φ = 12519648.

The previous prime is 12555947. The next prime is 12555989. The reversal of 12555973 is 37955521.

It is a happy number.

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 11035684 + 1520289 = 3322^2 + 1233^2 .

It is a cyclic number.

It is not a de Polignac number, because 12555973 - 2¹⁷ = 12424901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12552973) 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, 17640 + ... + 18337.

It is an arithmetic number, because the mean of its divisors is an integer number (3148075).

Almost surely, 2^12555973 is an apocalyptic number.

It is an amenable number.

12555973 is a deficient number, since it is larger than the sum of its proper divisors (36327).

12555973 is an equidigital number, since it uses as much as digits as its factorization.

12555973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36326.

The product of its digits is 47250, while the sum is 37.

The square root of 12555973 is about 3543.4408418937. The cubic root of 12555973 is about 232.4253307836.

It can be divided in two parts, 12 and 555973, that added together give a triangular number (555985 = T₁₀₅₄).

The spelling of 12555973 in words is "twelve million, five hundred fifty-five thousand, nine hundred seventy-three".