2120340 has 24 divisors (see below), whose sum is σ = 5937120. Its totient is φ = 565408.

The previous prime is 2120329. The next prime is 2120341. The reversal of 2120340 is 430212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120341) 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, 17610 + ... + 17729.

It is an arithmetic number, because the mean of its divisors is an integer number (247380).

2^2120340 is an apocalyptic number.

2120340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120340 is an abundant number, since it is smaller than the sum of its proper divisors (3816780).

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

2120340 is a wasteful number, since it uses less digits than its factorization.

2120340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35351 (or 35349 counting only the distinct ones).

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

The square root of 2120340 is about 1456.1387296546. The cubic root of 2120340 is about 128.4700329319.

Adding to 2120340 its reverse (430212), we get a palindrome (2550552).

The spelling of 2120340 in words is "two million, one hundred twenty thousand, three hundred forty".