12421738 has 8 divisors (see below), whose sum is σ = 21294432. Its totient is φ = 5323596.

The previous prime is 12421727. The next prime is 12421757. The reversal of 12421738 is 83712421.

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

It is a plaindrome in base 15.

It is an unprimeable number.

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, 443620 + ... + 443647.

It is an arithmetic number, because the mean of its divisors is an integer number (2661804).

Almost surely, 2^12421738 is an apocalyptic number.

12421738 is a deficient number, since it is larger than the sum of its proper divisors (8872694).

12421738 is an equidigital number, since it uses as much as digits as its factorization.

12421738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887276.

The product of its digits is 2688, while the sum is 28.

The square root of 12421738 is about 3524.4486093572. The cubic root of 12421738 is about 231.5940806244.

The spelling of 12421738 in words is "twelve million, four hundred twenty-one thousand, seven hundred thirty-eight".