2170257 has 16 divisors (see below), whose sum is σ = 3068928. Its totient is φ = 1361360.

The previous prime is 2170247. The next prime is 2170261. The reversal of 2170257 is 7520712.

It is a cyclic number.

It is not a de Polignac number, because 2170257 - 2⁴ = 2170241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2170247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4678 + ... + 5120.

It is an arithmetic number, because the mean of its divisors is an integer number (191808).

2^2170257 is an apocalyptic number.

It is an amenable number.

2170257 is a deficient number, since it is larger than the sum of its proper divisors (898671).

2170257 is a wasteful number, since it uses less digits than its factorization.

2170257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 2170257 is about 1473.1792151670. The cubic root of 2170257 is about 129.4703698304.

Adding to 2170257 its reverse (7520712), we get a palindrome (9690969).

The spelling of 2170257 in words is "two million, one hundred seventy thousand, two hundred fifty-seven".