12511973 has 4 divisors (see below), whose sum is σ = 12522048. Its totient is φ = 12501900.

The previous prime is 12511969. The next prime is 12511991. The reversal of 12511973 is 37911521.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12511973 - 2² = 12511969 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 (12511903) 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, 2861 + ... + 5762.

It is an arithmetic number, because the mean of its divisors is an integer number (3130512).

Almost surely, 2^12511973 is an apocalyptic number.

It is an amenable number.

12511973 is a deficient number, since it is larger than the sum of its proper divisors (10075).

12511973 is an equidigital number, since it uses as much as digits as its factorization.

12511973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10074.

The product of its digits is 1890, while the sum is 29.

The square root of 12511973 is about 3537.2267385623. The cubic root of 12511973 is about 232.1535163592.

The spelling of 12511973 in words is "twelve million, five hundred eleven thousand, nine hundred seventy-three".