2158287 has 8 divisors (see below), whose sum is σ = 2939136. Its totient is φ = 1408152.

The previous prime is 2158259. The next prime is 2158291. The reversal of 2158287 is 7828512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2158287 - 2⁶ = 2158223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158237) 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 in 7 ways as a sum of consecutive naturals, for example, 7513 + ... + 7794.

It is an arithmetic number, because the mean of its divisors is an integer number (367392).

2^2158287 is an apocalyptic number.

2158287 is a deficient number, since it is larger than the sum of its proper divisors (780849).

2158287 is a wasteful number, since it uses less digits than its factorization.

2158287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15357.

The product of its digits is 8960, while the sum is 33.

The square root of 2158287 is about 1469.1109556463. The cubic root of 2158287 is about 129.2319006366.

The spelling of 2158287 in words is "two million, one hundred fifty-eight thousand, two hundred eighty-seven".