2153240 has 16 divisors (see below), whose sum is σ = 4844880. Its totient is φ = 861280.

The previous prime is 2153227. The next prime is 2153243. The reversal of 2153240 is 423512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153243) 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, 26876 + ... + 26955.

It is an arithmetic number, because the mean of its divisors is an integer number (302805).

2^2153240 is an apocalyptic number.

2153240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2153240 is an abundant number, since it is smaller than the sum of its proper divisors (2691640).

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

2153240 is a wasteful number, since it uses less digits than its factorization.

2153240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53842 (or 53838 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 2153240 is about 1467.3922447662. The cubic root of 2153240 is about 129.1310888254.

Adding to 2153240 its reverse (423512), we get a palindrome (2576752).

The spelling of 2153240 in words is "two million, one hundred fifty-three thousand, two hundred forty".