2421740 has 24 divisors (see below), whose sum is σ = 5354160. Its totient is φ = 917568.

The previous prime is 2421737. The next prime is 2421743. The reversal of 2421740 is 471242.

It is an interprime number because it is at equal distance from previous prime (2421737) and next prime (2421743).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (2421743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2807 + ... + 3566.

It is an arithmetic number, because the mean of its divisors is an integer number (223090).

2^2421740 is an apocalyptic number.

2421740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2421740 is an abundant number, since it is smaller than the sum of its proper divisors (2932420).

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

2421740 is a wasteful number, since it uses less digits than its factorization.

2421740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401 (or 6399 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 2421740 is about 1556.1940753004. The cubic root of 2421740 is about 134.2896385928.

Adding to 2421740 its reverse (471242), we get a palindrome (2892982).

The spelling of 2421740 in words is "two million, four hundred twenty-one thousand, seven hundred forty".