2001057 has 4 divisors (see below), whose sum is σ = 2668080. Its totient is φ = 1334036.

The previous prime is 2001049. The next prime is 2001067. The reversal of 2001057 is 7501002.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 2001057 - 2³ = 2001049 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2001037) 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, 333507 + ... + 333512.

It is an arithmetic number, because the mean of its divisors is an integer number (667020).

2^2001057 is an apocalyptic number.

It is an amenable number.

2001057 is a deficient number, since it is larger than the sum of its proper divisors (667023).

2001057 is an equidigital number, since it uses as much as digits as its factorization.

2001057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667022.

The product of its (nonzero) digits is 70, while the sum is 15.

The square root of 2001057 is about 1414.5872189441. The cubic root of 2001057 is about 126.0142966897.

Adding to 2001057 its reverse (7501002), we get a palindrome (9502059).

Subtracting 2001057 from its reverse (7501002), we obtain a palindrome (5499945).

The spelling of 2001057 in words is "two million, one thousand, fifty-seven".