2171960 has 32 divisors (see below), whose sum is σ = 5585760. Its totient is φ = 744576.

The previous prime is 2171951. The next prime is 2171963. The reversal of 2171960 is 691712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171963) by changing a digit.

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, 3599 + ... + 4158.

It is an arithmetic number, because the mean of its divisors is an integer number (174555).

2^2171960 is an apocalyptic number.

2171960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2171960 is an abundant number, since it is smaller than the sum of its proper divisors (3413800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2171960 is a wasteful number, since it uses less digits than its factorization.

2171960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7775 (or 7771 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 2171960 is about 1473.7571034604. The cubic root of 2171960 is about 129.5042260960.

The spelling of 2171960 in words is "two million, one hundred seventy-one thousand, nine hundred sixty".