240605557 has 2 divisors, whose sum is σ = 240605558. Its totient is φ = 240605556.

The previous prime is 240605429. The next prime is 240605587. The reversal of 240605557 is 755506042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210859441 + 29746116 = 14521^2 + 5454^2 .

It is a cyclic number.

It is not a de Polignac number, because 240605557 - 2⁷ = 240605429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240605587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120302778 + 120302779.

It is an arithmetic number, because the mean of its divisors is an integer number (120302779).

Almost surely, 2^240605557 is an apocalyptic number.

It is an amenable number.

240605557 is a deficient number, since it is larger than the sum of its proper divisors (1).

240605557 is an equidigital number, since it uses as much as digits as its factorization.

240605557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 240605557 is about 15511.4653401927. The cubic root of 240605557 is about 621.9687306579.

The spelling of 240605557 in words is "two hundred forty million, six hundred five thousand, five hundred fifty-seven".