12505019 has 4 divisors (see below), whose sum is σ = 12541200. Its totient is φ = 12468840.

The previous prime is 12504977. The next prime is 12505037. The reversal of 12505019 is 91050521.

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-12505019 is a prime.

It is a super-2 number, since 2×12505019² = 312751000380722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12504985 and 12505003.

It is not an unprimeable number, because it can be changed into a prime (12505039) 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, 17567 + ... + 18264.

It is an arithmetic number, because the mean of its divisors is an integer number (3135300).

Almost surely, 2^12505019 is an apocalyptic number.

12505019 is a deficient number, since it is larger than the sum of its proper divisors (36181).

12505019 is an equidigital number, since it uses as much as digits as its factorization.

12505019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36180.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 12505019 is about 3536.2436284849. The cubic root of 12505019 is about 232.1104990368.

The spelling of 12505019 in words is "twelve million, five hundred five thousand, nineteen".