2724421 has 16 divisors (see below), whose sum is σ = 3266176. Its totient is φ = 2223936.

The previous prime is 2724401. The next prime is 2724427. The reversal of 2724421 is 1244272.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2724421 - 2⁵ = 2724389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2724392 and 2724401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2724427) 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, 17275 + ... + 17431.

It is an arithmetic number, because the mean of its divisors is an integer number (204136).

2^2724421 is an apocalyptic number.

It is an amenable number.

2724421 is a deficient number, since it is larger than the sum of its proper divisors (541755).

2724421 is a wasteful number, since it uses less digits than its factorization.

2724421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268.

The product of its digits is 896, while the sum is 22.

The square root of 2724421 is about 1650.5820185619. The cubic root of 2724421 is about 139.6662287042. Note that the first 3 decimals are identical.

Adding to 2724421 its reverse (1244272), we get a palindrome (3968693).

The spelling of 2724421 in words is "two million, seven hundred twenty-four thousand, four hundred twenty-one".