12461805 has 12 divisors (see below), whose sum is σ = 21600540. Its totient is φ = 6646272.

The previous prime is 12461797. The next prime is 12461807. The reversal of 12461805 is 50816421.

It can be written as a sum of positive squares in 2 ways, for example, as 6687396 + 5774409 = 2586^2 + 2403^2 .

It is not a de Polignac number, because 12461805 - 2³ = 12461797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12461807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138420 + ... + 138509.

It is an arithmetic number, because the mean of its divisors is an integer number (1800045).

Almost surely, 2^12461805 is an apocalyptic number.

12461805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12461805 is a deficient number, since it is larger than the sum of its proper divisors (9138735).

12461805 is a wasteful number, since it uses less digits than its factorization.

12461805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276940 (or 276937 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 12461805 is about 3530.1281846415. The cubic root of 12461805 is about 231.8428198622.

The spelling of 12461805 in words is "twelve million, four hundred sixty-one thousand, eight hundred five".