7875257 has 4 divisors (see below), whose sum is σ = 8481060. Its totient is φ = 7269456.

The previous prime is 7875227. The next prime is 7875281. The reversal of 7875257 is 7525787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7525787 = 71 ⋅105997.

It can be written as a sum of positive squares in 2 ways, for example, as 3083536 + 4791721 = 1756^2 + 2189^2 .

It is a cyclic number.

It is not a de Polignac number, because 7875257 - 2⁶ = 7875193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7875227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302882 + ... + 302907.

It is an arithmetic number, because the mean of its divisors is an integer number (2120265).

Almost surely, 2^7875257 is an apocalyptic number.

It is an amenable number.

7875257 is a deficient number, since it is larger than the sum of its proper divisors (605803).

7875257 is a wasteful number, since it uses less digits than its factorization.

7875257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605802.

The product of its digits is 137200, while the sum is 41.

The square root of 7875257 is about 2806.2888304663. The cubic root of 7875257 is about 198.9550246415.

The spelling of 7875257 in words is "seven million, eight hundred seventy-five thousand, two hundred fifty-seven".