2411821 has 2 divisors, whose sum is σ = 2411822. Its totient is φ = 2411820.

The previous prime is 2411797. The next prime is 2411833. The reversal of 2411821 is 1281142.

It is a happy number.

2411821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2175625 + 236196 = 1475^2 + 486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2411821 - 2⁷ = 2411693 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2411881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1205910 + 1205911.

It is an arithmetic number, because the mean of its divisors is an integer number (1205911).

2^2411821 is an apocalyptic number.

It is an amenable number.

2411821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2411821 is an equidigital number, since it uses as much as digits as its factorization.

2411821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 128, while the sum is 19.

The square root of 2411821 is about 1553.0038634852. The cubic root of 2411821 is about 134.1060458533.

Adding to 2411821 its reverse (1281142), we get a palindrome (3692963).

The spelling of 2411821 in words is "two million, four hundred eleven thousand, eight hundred twenty-one".