2463821 has 4 divisors (see below), whose sum is σ = 2467644. Its totient is φ = 2460000.

The previous prime is 2463779. The next prime is 2463833. The reversal of 2463821 is 1283642.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1283642 = 2 ⋅641821.

It can be written as a sum of positive squares in 2 ways, for example, as 990025 + 1473796 = 995^2 + 1214^2 .

It is a cyclic number.

It is not a de Polignac number, because 2463821 - 2⁶ = 2463757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2463841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680 + ... + 2321.

It is an arithmetic number, because the mean of its divisors is an integer number (616911).

2^2463821 is an apocalyptic number.

It is an amenable number.

2463821 is a deficient number, since it is larger than the sum of its proper divisors (3823).

2463821 is an equidigital number, since it uses as much as digits as its factorization.

2463821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822.

The product of its digits is 2304, while the sum is 26.

The square root of 2463821 is about 1569.6563318128. The cubic root of 2463821 is about 135.0629975753.

The spelling of 2463821 in words is "two million, four hundred sixty-three thousand, eight hundred twenty-one".