2340021 has 16 divisors (see below), whose sum is σ = 3343040. Its totient is φ = 1451520.

The previous prime is 2340011. The next prime is 2340029. The reversal of 2340021 is 1200432.

It is not a de Polignac number, because 2340021 - 2⁷ = 2339893 is a prime.

It is a Duffinian number.

It is a Curzon number.

2340021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2339979 and 2340006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2340029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3141 + ... + 3813.

It is an arithmetic number, because the mean of its divisors is an integer number (208940).

2^2340021 is an apocalyptic number.

It is an amenable number.

2340021 is a deficient number, since it is larger than the sum of its proper divisors (1003019).

2340021 is a wasteful number, since it uses less digits than its factorization.

2340021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2340021 is about 1529.7127181272. The cubic root of 2340021 is about 132.7618365746.

Adding to 2340021 its reverse (1200432), we get a palindrome (3540453).

The spelling of 2340021 in words is "two million, three hundred forty thousand, twenty-one".