12420471 has 24 divisors (see below), whose sum is σ = 20282880. Its totient is φ = 6722352.

The previous prime is 12420469. The next prime is 12420479. The reversal of 12420471 is 17402421.

It is a happy number.

It is not a de Polignac number, because 12420471 - 2¹ = 12420469 is a prime.

It is a super-3 number, since 3×12420471³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 570 + ... + 5016.

It is an arithmetic number, because the mean of its divisors is an integer number (845120).

Almost surely, 2^12420471 is an apocalyptic number.

12420471 is a deficient number, since it is larger than the sum of its proper divisors (7862409).

12420471 is a wasteful number, since it uses less digits than its factorization.

12420471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483 (or 4476 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 12420471 is about 3524.2688603454. The cubic root of 12420471 is about 231.5862062653.

Adding to 12420471 its reverse (17402421), we get a palindrome (29822892).

The spelling of 12420471 in words is "twelve million, four hundred twenty thousand, four hundred seventy-one".