12472321 has 4 divisors (see below), whose sum is σ = 12484144. Its totient is φ = 12460500.

The previous prime is 12472319. The next prime is 12472333. The reversal of 12472321 is 12327421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12472321 - 2¹ = 12472319 is a prime.

It is a super-2 number, since 2×12472321² = 311117582254082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12472292 and 12472301.

It is not an unprimeable number, because it can be changed into a prime (12472301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4155 + ... + 6496.

It is an arithmetic number, because the mean of its divisors is an integer number (3121036).

It is a Proth number, since it is equal to 3045 ⋅ 2¹² + 1 and 3045 < 2¹².

Almost surely, 2^12472321 is an apocalyptic number.

It is an amenable number.

12472321 is a deficient number, since it is larger than the sum of its proper divisors (11823).

12472321 is a wasteful number, since it uses less digits than its factorization.

12472321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11822.

The product of its digits is 672, while the sum is 22.

The square root of 12472321 is about 3531.6173348765. The cubic root of 12472321 is about 231.9080157046.

Adding to 12472321 its reverse (12327421), we get a palindrome (24799742).

The spelling of 12472321 in words is "twelve million, four hundred seventy-two thousand, three hundred twenty-one".