2382781 has 2 divisors, whose sum is σ = 2382782. Its totient is φ = 2382780.

The previous prime is 2382769. The next prime is 2382803. The reversal of 2382781 is 1872832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2374681 + 8100 = 1541^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 2382781 - 2⁵ = 2382749 is a prime.

It is a super-2 number, since 2×2382781² = 11355290587922, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2382701) 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 as a sum of consecutive naturals, namely, 1191390 + 1191391.

It is an arithmetic number, because the mean of its divisors is an integer number (1191391).

2^2382781 is an apocalyptic number.

It is an amenable number.

2382781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2382781 is an equidigital number, since it uses as much as digits as its factorization.

2382781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 31.

The square root of 2382781 is about 1543.6259261881. The cubic root of 2382781 is about 133.5656276988.

The spelling of 2382781 in words is "two million, three hundred eighty-two thousand, seven hundred eighty-one".