2152240 has 20 divisors (see below), whose sum is σ = 5004144. Its totient is φ = 860864.

The previous prime is 2152231. The next prime is 2152247. The reversal of 2152240 is 422512.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (2152247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13372 + ... + 13531.

2^2152240 is an apocalyptic number.

2152240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2152240 is an abundant number, since it is smaller than the sum of its proper divisors (2851904).

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

2152240 is a wasteful number, since it uses less digits than its factorization.

2152240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26916 (or 26910 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 2152240 is about 1467.0514646733. The cubic root of 2152240 is about 129.1110955309. Note that the first 3 decimals are identical.

Adding to 2152240 its reverse (422512), we get a palindrome (2574752).

The spelling of 2152240 in words is "two million, one hundred fifty-two thousand, two hundred forty".