2171090 has 16 divisors (see below), whose sum is σ = 3931200. Its totient is φ = 863280.

The previous prime is 2171089. The next prime is 2171101. The reversal of 2171090 is 901712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1445 + ... + 2535.

It is an arithmetic number, because the mean of its divisors is an integer number (245700).

2^2171090 is an apocalyptic number.

2171090 is a deficient number, since it is larger than the sum of its proper divisors (1760110).

2171090 is a wasteful number, since it uses less digits than its factorization.

2171090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 2171090 is about 1473.4619099251. The cubic root of 2171090 is about 129.4869323884.

The spelling of 2171090 in words is "two million, one hundred seventy-one thousand, ninety".