12457271 has 4 divisors (see below), whose sum is σ = 12793992. Its totient is φ = 12120552.

The previous prime is 12457219. The next prime is 12457301. The reversal of 12457271 is 17275421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12457271 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 (12457171) 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, 168305 + ... + 168378.

It is an arithmetic number, because the mean of its divisors is an integer number (3198498).

Almost surely, 2^12457271 is an apocalyptic number.

12457271 is a deficient number, since it is larger than the sum of its proper divisors (336721).

12457271 is an equidigital number, since it uses as much as digits as its factorization.

12457271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336720.

The product of its digits is 3920, while the sum is 29.

The square root of 12457271 is about 3529.4859399068. The cubic root of 12457271 is about 231.8146991939.

The spelling of 12457271 in words is "twelve million, four hundred fifty-seven thousand, two hundred seventy-one".