2173140 has 36 divisors (see below), whose sum is σ = 6592404. Its totient is φ = 579456.

The previous prime is 2173111. The next prime is 2173141. The reversal of 2173140 is 413712.

It can be written as a sum of positive squares in 2 ways, for example, as 318096 + 1855044 = 564^2 + 1362^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5857 + ... + 6216.

2^2173140 is an apocalyptic number.

2173140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2173140 is an abundant number, since it is smaller than the sum of its proper divisors (4419264).

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

2173140 is a wasteful number, since it uses less digits than its factorization.

2173140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12088 (or 12083 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 2173140 is about 1474.1573864415. The cubic root of 2173140 is about 129.5276745513.

Adding to 2173140 its reverse (413712), we get a palindrome (2586852).

The spelling of 2173140 in words is "two million, one hundred seventy-three thousand, one hundred forty".