12447135 has 32 divisors (see below), whose sum is σ = 22322880. Its totient is φ = 6580224.

The previous prime is 12447121. The next prime is 12447173. The reversal of 12447135 is 53174421.

It is not a de Polignac number, because 12447135 - 2⁷ = 12447007 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 12447099 and 12447108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18159 + ... + 18831.

It is an arithmetic number, because the mean of its divisors is an integer number (697590).

Almost surely, 2^12447135 is an apocalyptic number.

12447135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12447135 is a deficient number, since it is larger than the sum of its proper divisors (9875745).

12447135 is a wasteful number, since it uses less digits than its factorization.

12447135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 818 counting only the distinct ones).

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

The square root of 12447135 is about 3528.0497445473. The cubic root of 12447135 is about 231.7518092464.

The spelling of 12447135 in words is "twelve million, four hundred forty-seven thousand, one hundred thirty-five".