12500005 has 16 divisors (see below), whose sum is σ = 18046080. Its totient is φ = 8119872.

The previous prime is 12500003. The next prime is 12500029. The reversal of 12500005 is 50000521.

It is a cyclic number.

It is not a de Polignac number, because 12500005 - 2¹ = 12500003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12500003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8734 + ... + 10063.

It is an arithmetic number, because the mean of its divisors is an integer number (1127880).

Almost surely, 2^12500005 is an apocalyptic number.

It is an amenable number.

12500005 is a deficient number, since it is larger than the sum of its proper divisors (5546075).

12500005 is a wasteful number, since it uses less digits than its factorization.

12500005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18828.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 12500005 is about 3535.5346130394. The cubic root of 12500005 is about 232.0794726246.

Adding to 12500005 its reverse (50000521), we get a palindrome (62500526).

It can be divided in two parts, 1250000 and 5, that multiplied together give a 4-th power (6250000 = 50⁴).

The spelling of 12500005 in words is "twelve million, five hundred thousand, five".