2051257 has 8 divisors (see below), whose sum is σ = 2285640. Its totient is φ = 1827840.

The previous prime is 2051251. The next prime is 2051263. The reversal of 2051257 is 7521502.

It is an interprime number because it is at equal distance from previous prime (2051251) and next prime (2051263).

It can be written as a sum of positive squares in 4 ways, for example, as 212521 + 1838736 = 461^2 + 1356^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2051257 - 2³ = 2051249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051251) 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, 2344 + ... + 3097.

It is an arithmetic number, because the mean of its divisors is an integer number (285705).

2^2051257 is an apocalyptic number.

It is an amenable number.

2051257 is a deficient number, since it is larger than the sum of its proper divisors (234383).

2051257 is a wasteful number, since it uses less digits than its factorization.

2051257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5483.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 2051257 is about 1432.2210024993. The cubic root of 2051257 is about 127.0593683617.

Adding to 2051257 its reverse (7521502), we get a palindrome (9572759).

The spelling of 2051257 in words is "two million, fifty-one thousand, two hundred fifty-seven".