2551841 has 2 divisors, whose sum is σ = 2551842. Its totient is φ = 2551840.

The previous prime is 2551831. The next prime is 2551859. The reversal of 2551841 is 1481552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1918225 + 633616 = 1385^2 + 796^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551841 - 2¹⁴ = 2535457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2551841.

It is not a weakly prime, because it can be changed into another prime (2551831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275920 + 1275921.

It is an arithmetic number, because the mean of its divisors is an integer number (1275921).

2^2551841 is an apocalyptic number.

It is an amenable number.

2551841 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551841 is an equidigital number, since it uses as much as digits as its factorization.

2551841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1600, while the sum is 26.

The square root of 2551841 is about 1597.4482777229. The cubic root of 2551841 is about 136.6525909226.

The spelling of 2551841 in words is "two million, five hundred fifty-one thousand, eight hundred forty-one".