2106257 has 2 divisors, whose sum is σ = 2106258. Its totient is φ = 2106256.

The previous prime is 2106239. The next prime is 2106277. The reversal of 2106257 is 7526012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1324801 + 781456 = 1151^2 + 884^2 .

It is a cyclic number.

It is not a de Polignac number, because 2106257 - 2¹⁴ = 2089873 is a prime.

It is a Chen prime.

It is equal to p₁₅₆₂₄₅ and since 2106257 and 156245 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2106217) 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 as a sum of consecutive naturals, namely, 1053128 + 1053129.

It is an arithmetic number, because the mean of its divisors is an integer number (1053129).

2^2106257 is an apocalyptic number.

It is an amenable number.

2106257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106257 is an equidigital number, since it uses as much as digits as its factorization.

2106257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 2106257 is about 1451.2949390114. The cubic root of 2106257 is about 128.1849742620.

The spelling of 2106257 in words is "two million, one hundred six thousand, two hundred fifty-seven".