2117240 has 32 divisors (see below), whose sum is σ = 4883760. Its totient is φ = 825600.

The previous prime is 2117239. The next prime is 2117273. The reversal of 2117240 is 427112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 995 + ... + 2285.

2^2117240 is an apocalyptic number.

2117240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2117240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2441880).

2117240 is an abundant number, since it is smaller than the sum of its proper divisors (2766520).

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

2117240 is a wasteful number, since it uses less digits than its factorization.

2117240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1339 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 2117240 is about 1455.0738812858. The cubic root of 2117240 is about 128.4073933949.

It can be divided in two parts, 21172 and 40, that added together give a palindrome (21212).

The spelling of 2117240 in words is "two million, one hundred seventeen thousand, two hundred forty".