1057457 has 4 divisors (see below), whose sum is σ = 1075440. Its totient is φ = 1039476.

The previous prime is 1057421. The next prime is 1057477. The reversal of 1057457 is 7547501.

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 an emirpimes, since its reverse is a distinct semiprime: 7547501 = 13 ⋅580577.

It is a cyclic number.

It is not a de Polignac number, because 1057457 - 2⁶ = 1057393 is a prime.

It is a super-2 number, since 2×1057457² = 2236430613698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1057477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8903 + ... + 9020.

It is an arithmetic number, because the mean of its divisors is an integer number (268860).

2^1057457 is an apocalyptic number.

It is an amenable number.

1057457 is a deficient number, since it is larger than the sum of its proper divisors (17983).

1057457 is an equidigital number, since it uses as much as digits as its factorization.

1057457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17982.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 1057457 is about 1028.3272825322. The cubic root of 1057457 is about 101.8796799888.

The spelling of 1057457 in words is "one million, fifty-seven thousand, four hundred fifty-seven".