12135447 has 32 divisors (see below), whose sum is σ = 18754560. Its totient is φ = 7750080.

The previous prime is 12135443. The next prime is 12135451. The reversal of 12135447 is 74453121.

12135447 is a `hidden beast` number, since 1 + 213 + 5 + 447 = 666.

12135447 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12135443) and next prime (12135451).

It is not a de Polignac number, because 12135447 - 2² = 12135443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 12135447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12135443) 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, 92572 + ... + 92702.

It is an arithmetic number, because the mean of its divisors is an integer number (586080).

Almost surely, 2^12135447 is an apocalyptic number.

12135447 is a deficient number, since it is larger than the sum of its proper divisors (6619113).

12135447 is a wasteful number, since it uses less digits than its factorization.

12135447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 254 counting only the distinct ones).

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

The square root of 12135447 is about 3483.5968480868. The cubic root of 12135447 is about 229.8010062060.

Adding to 12135447 its reverse (74453121), we get a palindrome (86588568).

The spelling of 12135447 in words is "twelve million, one hundred thirty-five thousand, four hundred forty-seven".