12505011 has 4 divisors (see below), whose sum is σ = 16673352. Its totient is φ = 8336672.

The previous prime is 12504977. The next prime is 12505037. The reversal of 12505011 is 11050521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12505011 is a prime.

It is a super-2 number, since 2×12505011² = 312750600220242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12505091) 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, 2084166 + ... + 2084171.

It is an arithmetic number, because the mean of its divisors is an integer number (4168338).

Almost surely, 2^12505011 is an apocalyptic number.

12505011 is a deficient number, since it is larger than the sum of its proper divisors (4168341).

12505011 is an equidigital number, since it uses as much as digits as its factorization.

12505011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168340.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 12505011 is about 3536.2424973409. The cubic root of 12505011 is about 232.1104495397.

Adding to 12505011 its reverse (11050521), we get a palindrome (23555532).

The spelling of 12505011 in words is "twelve million, five hundred five thousand, eleven".