12421751 has 8 divisors (see below), whose sum is σ = 12874704. Its totient is φ = 11975040.

The previous prime is 12421727. The next prime is 12421757. The reversal of 12421751 is 15712421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12421751 is a prime.

It is a super-3 number, since 3×12421751³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2696 + ... + 5666.

It is an arithmetic number, because the mean of its divisors is an integer number (1609338).

Almost surely, 2^12421751 is an apocalyptic number.

12421751 is a deficient number, since it is larger than the sum of its proper divisors (452953).

12421751 is a wasteful number, since it uses less digits than its factorization.

12421751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121.

The product of its digits is 560, while the sum is 23.

The square root of 12421751 is about 3524.4504536168. The cubic root of 12421751 is about 231.5941614162.

The spelling of 12421751 in words is "twelve million, four hundred twenty-one thousand, seven hundred fifty-one".