2492821 has 2 divisors, whose sum is σ = 2492822. Its totient is φ = 2492820.

The previous prime is 2492813. The next prime is 2492827. The reversal of 2492821 is 1282942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1347921 + 1144900 = 1161^2 + 1070^2 .

It is a cyclic number.

It is not a de Polignac number, because 2492821 - 2³ = 2492813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2492821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2492827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1246410 + 1246411.

It is an arithmetic number, because the mean of its divisors is an integer number (1246411).

2^2492821 is an apocalyptic number.

It is an amenable number.

2492821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2492821 is an equidigital number, since it uses as much as digits as its factorization.

2492821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 2492821 is about 1578.8669988318. The cubic root of 2492821 is about 135.5908442521.

The spelling of 2492821 in words is "two million, four hundred ninety-two thousand, eight hundred twenty-one".