12400946 has 8 divisors (see below), whose sum is σ = 18837120. Its totient is φ = 6121908.

The previous prime is 12400943. The next prime is 12400967. The reversal of 12400946 is 64900421.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12400943) 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, 39086 + ... + 39401.

It is an arithmetic number, because the mean of its divisors is an integer number (2354640).

Almost surely, 2^12400946 is an apocalyptic number.

12400946 is a deficient number, since it is larger than the sum of its proper divisors (6436174).

12400946 is an equidigital number, since it uses as much as digits as its factorization.

12400946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78568.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 12400946 is about 3521.4976927438. The cubic root of 12400946 is about 231.4647913278.

The spelling of 12400946 in words is "twelve million, four hundred thousand, nine hundred forty-six".