2057751 has 8 divisors (see below), whose sum is σ = 3048560. Its totient is φ = 1371816.

The previous prime is 2057747. The next prime is 2057761. The reversal of 2057751 is 1577502.

It is not a de Polignac number, because 2057751 - 2² = 2057747 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 76213 = 2057751 / (2 + 0 + 5 + 7 + 7 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2057701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38080 + ... + 38133.

It is an arithmetic number, because the mean of its divisors is an integer number (381070).

2^2057751 is an apocalyptic number.

2057751 is a deficient number, since it is larger than the sum of its proper divisors (990809).

2057751 is an equidigital number, since it uses as much as digits as its factorization.

2057751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76222 (or 76216 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 2057751 is about 1434.4863192098. The cubic root of 2057751 is about 127.1933113250.

Subtracting from 2057751 its reverse (1577502), we obtain a square (480249 = 693²).

The spelling of 2057751 in words is "two million, fifty-seven thousand, seven hundred fifty-one".