240045257 has 2 divisors, whose sum is σ = 240045258. Its totient is φ = 240045256.

The previous prime is 240045229. The next prime is 240045263. The reversal of 240045257 is 752540042.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237807241 + 2238016 = 15421^2 + 1496^2 .

It is a cyclic number.

It is not a de Polignac number, because 240045257 - 2¹⁶ = 239979721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (240044257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120022628 + 120022629.

It is an arithmetic number, because the mean of its divisors is an integer number (120022629).

Almost surely, 2^240045257 is an apocalyptic number.

It is an amenable number.

240045257 is a deficient number, since it is larger than the sum of its proper divisors (1).

240045257 is an equidigital number, since it uses as much as digits as its factorization.

240045257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 29.

The square root of 240045257 is about 15493.3939793707. The cubic root of 240045257 is about 621.4855609639.

Adding to 240045257 its reverse (752540042), we get a palindrome (992585299).

The spelling of 240045257 in words is "two hundred forty million, forty-five thousand, two hundred fifty-seven".