12109450 has 24 divisors (see below), whose sum is σ = 22712832. Its totient is φ = 4803120.

The previous prime is 12109417. The next prime is 12109463. The reversal of 12109450 is 5490121.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5397 + ... + 7303.

It is an arithmetic number, because the mean of its divisors is an integer number (946368).

Almost surely, 2^12109450 is an apocalyptic number.

12109450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12109450 is a deficient number, since it is larger than the sum of its proper divisors (10603382).

12109450 is a wasteful number, since it uses less digits than its factorization.

12109450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046 (or 2041 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 12109450 is about 3479.8635030702. The cubic root of 12109450 is about 229.6367928387.

Adding to 12109450 its reverse (5490121), we get a palindrome (17599571).

The spelling of 12109450 in words is "twelve million, one hundred nine thousand, four hundred fifty".