12109658 has 8 divisors (see below), whose sum is σ = 19815840. Its totient is φ = 5504380.

The previous prime is 12109651. The next prime is 12109667. The reversal of 12109658 is 85690121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12109651) 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 3 ways as a sum of consecutive naturals, for example, 275198 + ... + 275241.

It is an arithmetic number, because the mean of its divisors is an integer number (2476980).

Almost surely, 2^12109658 is an apocalyptic number.

12109658 is a deficient number, since it is larger than the sum of its proper divisors (7706182).

12109658 is a wasteful number, since it uses less digits than its factorization.

12109658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550452.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 12109658 is about 3479.8933891716. The cubic root of 12109658 is about 229.6381076295.

Adding to 12109658 its reverse (85690121), we get a palindrome (97799779).

The spelling of 12109658 in words is "twelve million, one hundred nine thousand, six hundred fifty-eight".