2421440261 has 2 divisors, whose sum is σ = 2421440262. Its totient is φ = 2421440260.

The previous prime is 2421440251. The next prime is 2421440269. The reversal of 2421440261 is 1620441242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2244390625 + 177049636 = 47375^2 + 13306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2421440261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2421440261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2421440269) 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, 1210720130 + 1210720131.

It is an arithmetic number, because the mean of its divisors is an integer number (1210720131).

Almost surely, 2^2421440261 is an apocalyptic number.

It is an amenable number.

2421440261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421440261 is an equidigital number, since it uses as much as digits as its factorization.

2421440261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 2421440261 is about 49208.1320616827. The cubic root of 2421440261 is about 1342.8409801688.

The spelling of 2421440261 in words is "two billion, four hundred twenty-one million, four hundred forty thousand, two hundred sixty-one".