1257271056 has 60 divisors (see below), whose sum is σ = 3593496192. Its totient is φ = 410171328.

The previous prime is 1257271051. The next prime is 1257271121. The reversal of 1257271056 is 6501727521.

1257271056 is a `hidden beast` number, since 12 + 572 + 71 + 0 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1257271056.

It is not an unprimeable number, because it can be changed into a prime (1257271051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86116 + ... + 99651.

Almost surely, 2^1257271056 is an apocalyptic number.

1257271056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1257271056 is an abundant number, since it is smaller than the sum of its proper divisors (2336225136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1257271056 is a wasteful number, since it uses less digits than its factorization.

1257271056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185828 (or 185819 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 1257271056 is about 35458.0182187330. The cubic root of 1257271056 is about 1079.3019769361.

Adding to 1257271056 its reverse (6501727521), we get a palindrome (7758998577).

The spelling of 1257271056 in words is "one billion, two hundred fifty-seven million, two hundred seventy-one thousand, fifty-six".