12700905 has 32 divisors (see below), whose sum is σ = 23556864. Its totient is φ = 5723136.

The previous prime is 12700903. The next prime is 12700913. The reversal of 12700905 is 50900721.

12700905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12700905 - 2¹ = 12700903 is a prime.

It is a super-2 number, since 2×12700905² = 322625975638050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12700901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6837 + ... + 8493.

It is an arithmetic number, because the mean of its divisors is an integer number (736152).

Almost surely, 2^12700905 is an apocalyptic number.

12700905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12700905 is a deficient number, since it is larger than the sum of its proper divisors (10855959).

12700905 is a wasteful number, since it uses less digits than its factorization.

12700905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 12700905 is about 3563.8329085410. The cubic root of 12700905 is about 233.3161971542.

The spelling of 12700905 in words is "twelve million, seven hundred thousand, nine hundred five".