12457071 has 60 divisors (see below), whose sum is σ = 21628992. Its totient is φ = 7128000.

The previous prime is 12457061. The next prime is 12457091. The reversal of 12457071 is 17075421.

12457071 is a `hidden beast` number, since 1 + 24 + 570 + 71 = 666.

It is not a de Polignac number, because 12457071 - 2⁷ = 12456943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12457001) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 303811 + ... + 303851.

Almost surely, 2^12457071 is an apocalyptic number.

12457071 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12457071 is a deficient number, since it is larger than the sum of its proper divisors (9171921).

12457071 is a wasteful number, since it uses less digits than its factorization.

12457071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 12457071 is about 3529.4576070552. The cubic root of 12457071 is about 231.8134586015.

The spelling of 12457071 in words is "twelve million, four hundred fifty-seven thousand, seventy-one".