12117654 has 16 divisors (see below), whose sum is σ = 26928240. Its totient is φ = 4039200.

The previous prime is 12117607. The next prime is 12117659. The reversal of 12117654 is 45671121.

It is a happy number.

12117654 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 7 + 654 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12117659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112147 + ... + 112254.

It is an arithmetic number, because the mean of its divisors is an integer number (1683015).

Almost surely, 2^12117654 is an apocalyptic number.

12117654 is an abundant number, since it is smaller than the sum of its proper divisors (14810586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12117654 is a wasteful number, since it uses less digits than its factorization.

12117654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224412 (or 224406 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 12117654 is about 3481.0420853532. The cubic root of 12117654 is about 229.6886398111.

Adding to 12117654 its reverse (45671121), we get a palindrome (57788775).

The spelling of 12117654 in words is "twelve million, one hundred seventeen thousand, six hundred fifty-four".