26857001 has 2 divisors, whose sum is σ = 26857002. Its totient is φ = 26857000.

The previous prime is 26856997. The next prime is 26857003. The reversal of 26857001 is 10075862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26677225 + 179776 = 5165^2 + 424^2 .

It is a cyclic number.

It is not a de Polignac number, because 26857001 - 2² = 26856997 is a prime.

Together with 26857003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26857003) 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 as a sum of consecutive naturals, namely, 13428500 + 13428501.

It is an arithmetic number, because the mean of its divisors is an integer number (13428501).

Almost surely, 2^26857001 is an apocalyptic number.

It is an amenable number.

26857001 is a deficient number, since it is larger than the sum of its proper divisors (1).

26857001 is an equidigital number, since it uses as much as digits as its factorization.

26857001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 26857001 is about 5182.3740698641. The cubic root of 26857001 is about 299.4694363011.

The spelling of 26857001 in words is "twenty-six million, eight hundred fifty-seven thousand, one".