2422781 has 2 divisors, whose sum is σ = 2422782. Its totient is φ = 2422780.

The previous prime is 2422759. The next prime is 2422793. The reversal of 2422781 is 1872242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1836025 + 586756 = 1355^2 + 766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2422781 is a prime.

It is a super-2 number, since 2×2422781² = 11739735547922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2422781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2422711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1211390 + 1211391.

It is an arithmetic number, because the mean of its divisors is an integer number (1211391).

2^2422781 is an apocalyptic number.

It is an amenable number.

2422781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2422781 is an equidigital number, since it uses as much as digits as its factorization.

2422781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1792, while the sum is 26.

The square root of 2422781 is about 1556.5285092153. The cubic root of 2422781 is about 134.3088775818.

The spelling of 2422781 in words is "two million, four hundred twenty-two thousand, seven hundred eighty-one".