12276405 has 12 divisors (see below), whose sum is σ = 21279180. Its totient is φ = 6547392.

The previous prime is 12276401. The next prime is 12276409. The reversal of 12276405 is 50467221.

12276405 is a `hidden beast` number, since 12 + 2 + 7 + 640 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (12276401) and next prime (12276409).

It can be written as a sum of positive squares in 2 ways, for example, as 3755844 + 8520561 = 1938^2 + 2919^2 .

It is not a de Polignac number, because 12276405 - 2² = 12276401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12276401) 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, 136360 + ... + 136449.

It is an arithmetic number, because the mean of its divisors is an integer number (1773265).

Almost surely, 2^12276405 is an apocalyptic number.

12276405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12276405 is a deficient number, since it is larger than the sum of its proper divisors (9002775).

12276405 is a wasteful number, since it uses less digits than its factorization.

12276405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272820 (or 272817 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 12276405 is about 3503.7701123219. The cubic root of 12276405 is about 230.6873264469.

The spelling of 12276405 in words is "twelve million, two hundred seventy-six thousand, four hundred five".