2405442581 has 2 divisors, whose sum is σ = 2405442582. Its totient is φ = 2405442580.

The previous prime is 2405442499. The next prime is 2405442587. The reversal of 2405442581 is 1852445042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2207590225 + 197852356 = 46985^2 + 14066^2 .

It is a cyclic number.

It is not a de Polignac number, because 2405442581 - 2¹⁰ = 2405441557 is a prime.

It is a super-2 number, since 2×2405442581² = 11572308020975883122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2405442587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1202721290 + 1202721291.

It is an arithmetic number, because the mean of its divisors is an integer number (1202721291).

Almost surely, 2^2405442581 is an apocalyptic number.

It is an amenable number.

2405442581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2405442581 is an equidigital number, since it uses as much as digits as its factorization.

2405442581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51200, while the sum is 35.

The square root of 2405442581 is about 49045.3115088486. The cubic root of 2405442581 is about 1339.8772036059.

The spelling of 2405442581 in words is "two billion, four hundred five million, four hundred forty-two thousand, five hundred eighty-one".