12471531 has 4 divisors (see below), whose sum is σ = 16628712. Its totient is φ = 8314352.

The previous prime is 12471499. The next prime is 12471533. The reversal of 12471531 is 13517421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13517421 = 3 ⋅4505807.

It is a cyclic number.

It is not a de Polignac number, because 12471531 - 2⁵ = 12471499 is a prime.

It is a super-2 number, since 2×12471531² = 311078170967922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12471533) 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, 2078586 + ... + 2078591.

It is an arithmetic number, because the mean of its divisors is an integer number (4157178).

Almost surely, 2^12471531 is an apocalyptic number.

12471531 is a deficient number, since it is larger than the sum of its proper divisors (4157181).

12471531 is an equidigital number, since it uses as much as digits as its factorization.

12471531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157180.

The product of its digits is 840, while the sum is 24.

The square root of 12471531 is about 3531.5054863330. The cubic root of 12471531 is about 231.9031192302.

Adding to 12471531 its reverse (13517421), we get a palindrome (25988952).

The spelling of 12471531 in words is "twelve million, four hundred seventy-one thousand, five hundred thirty-one".