2422721 has 8 divisors (see below), whose sum is σ = 2931840. Its totient is φ = 1954368.

The previous prime is 2422711. The next prime is 2422727. The reversal of 2422721 is 1272242.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2422721 - 2⁶ = 2422657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2422693 and 2422702.

It is not an unprimeable number, because it can be changed into a prime (2422727) 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, 10061 + ... + 10298.

It is an arithmetic number, because the mean of its divisors is an integer number (366480).

2^2422721 is an apocalyptic number.

It is an amenable number.

2422721 is a deficient number, since it is larger than the sum of its proper divisors (509119).

2422721 is a wasteful number, since it uses less digits than its factorization.

2422721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20383.

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

The square root of 2422721 is about 1556.5092354368. The cubic root of 2422721 is about 134.3077688560.

Adding to 2422721 its reverse (1272242), we get a palindrome (3694963).

The spelling of 2422721 in words is "two million, four hundred twenty-two thousand, seven hundred twenty-one".