2123240 has 32 divisors (see below), whose sum is σ = 5460480.
Its totient is φ = 727872.
The previous prime is 2123239. The next prime is 2123243. The reversal of 2123240 is 423212.
Adding to 2123240 its reverse (423212), we get a palindrome (2546452).
It is a Harshad number since it is a multiple of its sum of digits (14).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2123243) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3512 + ... + 4071.
It is an arithmetic number, because the mean of its divisors is an integer number (170640).
22123240 is an apocalyptic number.
2123240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
2123240 is an abundant number, since it is smaller than the sum of its proper divisors (3337240).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2123240 is a wasteful number, since it uses less digits than its factorization.
2123240 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7601 (or 7597 counting only the distinct ones).
The product of its (nonzero) digits is 96, while the sum is 14.
The square root of 2123240 is about 1457.1341736436.
The cubic root of 2123240 is about 128.5285759599.
The spelling of 2123240 in words is "two million, one hundred twenty-three thousand, two hundred forty".