1057671257 has 4 divisors (see below), whose sum is σ = 1058708196. Its totient is φ = 1056634320.

The previous prime is 1057671247. The next prime is 1057671281. The reversal of 1057671257 is 7521767501.

It is a happy number.

1057671257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7521767501 = 1291 ⋅5826311.

It can be written as a sum of positive squares in 2 ways, for example, as 313254601 + 744416656 = 17699^2 + 27284^2 .

It is a cyclic number.

It is not a de Polignac number, because 1057671257 - 2⁸ = 1057671001 is a prime.

It is a super-2 number, since 2×1057671257² = 2237336975767920098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1057671227) 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, 516938 + ... + 518979.

It is an arithmetic number, because the mean of its divisors is an integer number (264677049).

Almost surely, 2^1057671257 is an apocalyptic number.

It is an amenable number.

1057671257 is a deficient number, since it is larger than the sum of its proper divisors (1036939).

1057671257 is a wasteful number, since it uses less digits than its factorization.

1057671257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036938.

The product of its (nonzero) digits is 102900, while the sum is 41.

The square root of 1057671257 is about 32521.8581418713. The cubic root of 1057671257 is about 1018.8656031911.

The spelling of 1057671257 in words is "one billion, fifty-seven million, six hundred seventy-one thousand, two hundred fifty-seven".