4091287 has 8 divisors (see below), whose sum is σ = 4247552. Its totient is φ = 3936600.

The previous prime is 4091281. The next prime is 4091293. The reversal of 4091287 is 7821904.

It is an interprime number because it is at equal distance from previous prime (4091281) and next prime (4091293).

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

It is a cyclic number.

It is not a de Polignac number, because 4091287 - 2³ = 4091279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4091281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8158 + ... + 8644.

It is an arithmetic number, because the mean of its divisors is an integer number (530944).

Almost surely, 2^4091287 is an apocalyptic number.

4091287 is a deficient number, since it is larger than the sum of its proper divisors (156265).

4091287 is a wasteful number, since it uses less digits than its factorization.

4091287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 4091287 is about 2022.6930068599. The cubic root of 4091287 is about 159.9386092604.

The spelling of 4091287 in words is "four million, ninety-one thousand, two hundred eighty-seven".