2405442257 has 2 divisors, whose sum is σ = 2405442258. Its totient is φ = 2405442256.

The previous prime is 2405442253. The next prime is 2405442287. The reversal of 2405442257 is 7522445042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2046567121 + 358875136 = 45239^2 + 18944^2 .

It is a cyclic number.

It is not a de Polignac number, because 2405442257 - 2² = 2405442253 is a prime.

It is a super-2 number, since 2×2405442257² = 11572304903522508098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2405442253) 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, 1202721128 + 1202721129.

It is an arithmetic number, because the mean of its divisors is an integer number (1202721129).

Almost surely, 2^2405442257 is an apocalyptic number.

It is an amenable number.

2405442257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2405442257 is an equidigital number, since it uses as much as digits as its factorization.

2405442257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 89600, while the sum is 35.

The square root of 2405442257 is about 49045.3082057805. The cubic root of 2405442257 is about 1339.8771434479.

Adding to 2405442257 its reverse (7522445042), we get a palindrome (9927887299).

The spelling of 2405442257 in words is "two billion, four hundred five million, four hundred forty-two thousand, two hundred fifty-seven".