12421669 has 12 divisors (see below), whose sum is σ = 13890432. Its totient is φ = 11091600.

The previous prime is 12421639. The next prime is 12421681. The reversal of 12421669 is 96612421.

12421669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12421669 - 2⁵ = 12421637 is a prime.

It is a super-2 number, since 2×12421669² = 308595721491122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12421669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4054 + ... + 6424.

It is an arithmetic number, because the mean of its divisors is an integer number (1157536).

Almost surely, 2^12421669 is an apocalyptic number.

It is an amenable number.

12421669 is a deficient number, since it is larger than the sum of its proper divisors (1468763).

12421669 is a wasteful number, since it uses less digits than its factorization.

12421669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428 (or 2415 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 12421669 is about 3524.4388205784. The cubic root of 12421669 is about 231.5936518057.

The spelling of 12421669 in words is "twelve million, four hundred twenty-one thousand, six hundred sixty-nine".