2170887 has 8 divisors (see below), whose sum is σ = 2901360. Its totient is φ = 1443840.

The previous prime is 2170877. The next prime is 2170897. The reversal of 2170887 is 7880712.

It is an interprime number because it is at equal distance from previous prime (2170877) and next prime (2170897).

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

It is not a de Polignac number, because 2170887 - 2⁴ = 2170871 is a prime.

2170887 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2170877) 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, 1837 + ... + 2777.

It is an arithmetic number, because the mean of its divisors is an integer number (362670).

2^2170887 is an apocalyptic number.

2170887 is a deficient number, since it is larger than the sum of its proper divisors (730473).

2170887 is an equidigital number, since it uses as much as digits as its factorization.

2170887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713.

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 2170887 is about 1473.3930229236. The cubic root of 2170887 is about 129.4828965252.

It can be divided in two parts, 21708 and 87, that multiplied together give a triangular number (1888596 = T₁₉₄₃).

The spelling of 2170887 in words is "two million, one hundred seventy thousand, eight hundred eighty-seven".