12471157 has 4 divisors (see below), whose sum is σ = 12480480. Its totient is φ = 12461836.

The previous prime is 12471139. The next prime is 12471167. The reversal of 12471157 is 75117421.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12471157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12471127) 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, 2233 + ... + 5470.

It is an arithmetic number, because the mean of its divisors is an integer number (3120120).

Almost surely, 2^12471157 is an apocalyptic number.

It is an amenable number.

12471157 is a deficient number, since it is larger than the sum of its proper divisors (9323).

12471157 is an equidigital number, since it uses as much as digits as its factorization.

12471157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9322.

The product of its digits is 1960, while the sum is 28.

The square root of 12471157 is about 3531.4525340149. The cubic root of 12471157 is about 231.9008010803.

Adding to 12471157 its reverse (75117421), we get a palindrome (87588578).

The spelling of 12471157 in words is "twelve million, four hundred seventy-one thousand, one hundred fifty-seven".