287157 has 16 divisors (see below), whose sum is σ = 425600. Its totient is φ = 171072.

The previous prime is 287149. The next prime is 287159. The reversal of 287157 is 751782.

It is a happy number.

It is not a de Polignac number, because 287157 - 2³ = 287149 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287157.

It is not an unprimeable number, because it can be changed into a prime (287159) 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, 1344 + ... + 1542.

It is an arithmetic number, because the mean of its divisors is an integer number (26600).

2²⁸⁷¹⁵⁷ is an apocalyptic number.

It is an amenable number.

287157 is a deficient number, since it is larger than the sum of its proper divisors (138443).

287157 is a wasteful number, since it uses less digits than its factorization.

287157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252.

The product of its digits is 3920, while the sum is 30.

The square root of 287157 is about 535.8703201335. The cubic root of 287157 is about 65.9740485667.

It can be divided in two parts, 287 and 157, that added together give a palindrome (444).

The spelling of 287157 in words is "two hundred eighty-seven thousand, one hundred fifty-seven".