12471421 has 16 divisors (see below), whose sum is σ = 14016240. Its totient is φ = 11038720.

The previous prime is 12471413. The next prime is 12471427. The reversal of 12471421 is 12417421.

It can be written as a sum of positive squares in 8 ways, for example, as 2160900 + 10310521 = 1470^2 + 3211^2 .

It is a cyclic number.

It is not a de Polignac number, because 12471421 - 2³ = 12471413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12471392 and 12471401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12471427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19905 + ... + 20521.

It is an arithmetic number, because the mean of its divisors is an integer number (876015).

Almost surely, 2^12471421 is an apocalyptic number.

It is an amenable number.

12471421 is a deficient number, since it is larger than the sum of its proper divisors (1544819).

12471421 is a wasteful number, since it uses less digits than its factorization.

12471421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704.

The product of its digits is 448, while the sum is 22.

The square root of 12471421 is about 3531.4899122042. The cubic root of 12471421 is about 231.9024374262.

Adding to 12471421 its reverse (12417421), we get a palindrome (24888842).

The spelling of 12471421 in words is "twelve million, four hundred seventy-one thousand, four hundred twenty-one".