12421761 has 8 divisors (see below), whose sum is σ = 18068064. Its totient is φ = 7528320.

The previous prime is 12421757. The next prime is 12421789. The reversal of 12421761 is 16712421.

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

It is not a de Polignac number, because 12421761 - 2² = 12421757 is a prime.

It is a super-2 number, since 2×12421761² = 308600292682242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12421061) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 188176 + ... + 188241.

It is an arithmetic number, because the mean of its divisors is an integer number (2258508).

Almost surely, 2^12421761 is an apocalyptic number.

12421761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12421761 is a deficient number, since it is larger than the sum of its proper divisors (5646303).

12421761 is a wasteful number, since it uses less digits than its factorization.

12421761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376431.

The product of its digits is 672, while the sum is 24.

The square root of 12421761 is about 3524.4518722774. The cubic root of 12421761 is about 231.5942235636.

It can be divided in two parts, 1242 and 1761, that added together give a palindrome (3003).

The spelling of 12421761 in words is "twelve million, four hundred twenty-one thousand, seven hundred sixty-one".