2126857 has 2 divisors, whose sum is σ = 2126858. Its totient is φ = 2126856.

The previous prime is 2126851. The next prime is 2126863. The reversal of 2126857 is 7586212.

It is a balanced prime because it is at equal distance from previous prime (2126851) and next prime (2126863).

It can be written as a sum of positive squares in only one way, i.e., 2005056 + 121801 = 1416^2 + 349^2 .

It is a cyclic number.

It is not a de Polignac number, because 2126857 - 2³ = 2126849 is a prime.

It is an Ulam number.

It is equal to p₁₅₇₆₅₇ and since 2126857 and 157657 have the same sum of digits, it is a Honaker prime.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (2126851) 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, 1063428 + 1063429.

It is an arithmetic number, because the mean of its divisors is an integer number (1063429).

2^2126857 is an apocalyptic number.

It is an amenable number.

2126857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126857 is an equidigital number, since it uses as much as digits as its factorization.

2126857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 31.

The square root of 2126857 is about 1458.3747803634. The cubic root of 2126857 is about 128.6015185894.

The spelling of 2126857 in words is "two million, one hundred twenty-six thousand, eight hundred fifty-seven".