12511001 has 4 divisors (see below), whose sum is σ = 12537600. Its totient is φ = 12484404.

The previous prime is 12510989. The next prime is 12511003. The reversal of 12511001 is 10011521.

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 12511001 - 2⁶ = 12510937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12511003) 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, 12581 + ... + 13538.

It is an arithmetic number, because the mean of its divisors is an integer number (3134400).

Almost surely, 2^12511001 is an apocalyptic number.

It is an amenable number.

12511001 is a deficient number, since it is larger than the sum of its proper divisors (26599).

12511001 is an equidigital number, since it uses as much as digits as its factorization.

12511001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26598.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 12511001 is about 3537.0893401213. The cubic root of 12511001 is about 232.1475045426.

Adding to 12511001 its reverse (10011521), we get a palindrome (22522522).

The spelling of 12511001 in words is "twelve million, five hundred eleven thousand, one".