2420621 has 4 divisors (see below), whose sum is σ = 2766432. Its totient is φ = 2074812.

The previous prime is 2420611. The next prime is 2420633. The reversal of 2420621 is 1260242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2420621 - 2⁶ = 2420557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2420621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2420611) 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 3 ways as a sum of consecutive naturals, for example, 172895 + ... + 172908.

It is an arithmetic number, because the mean of its divisors is an integer number (691608).

2^2420621 is an apocalyptic number.

It is an amenable number.

2420621 is a deficient number, since it is larger than the sum of its proper divisors (345811).

2420621 is an equidigital number, since it uses as much as digits as its factorization.

2420621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345810.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2420621 is about 1555.8345027669. The cubic root of 2420621 is about 134.2689519162.

Adding to 2420621 its reverse (1260242), we get a palindrome (3680863).

The spelling of 2420621 in words is "two million, four hundred twenty thousand, six hundred twenty-one".