5257687 has 4 divisors (see below), whose sum is σ = 5324320. Its totient is φ = 5191056.

The previous prime is 5257627. The next prime is 5257711. The reversal of 5257687 is 7867525.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5257687 - 2⁷ = 5257559 is a prime.

It is a Duffinian number.

5257687 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5257627) 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, 33198 + ... + 33355.

It is an arithmetic number, because the mean of its divisors is an integer number (1331080).

Almost surely, 2^5257687 is an apocalyptic number.

5257687 is a deficient number, since it is larger than the sum of its proper divisors (66633).

5257687 is an equidigital number, since it uses as much as digits as its factorization.

5257687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66632.

The product of its digits is 117600, while the sum is 40.

The square root of 5257687 is about 2292.9646748260. The cubic root of 5257687 is about 173.8861169626.

The spelling of 5257687 in words is "five million, two hundred fifty-seven thousand, six hundred eighty-seven".