240153257 has 2 divisors, whose sum is σ = 240153258. Its totient is φ = 240153256.

The previous prime is 240153253. The next prime is 240153299. The reversal of 240153257 is 752351042.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162078361 + 78074896 = 12731^2 + 8836^2 .

It is a cyclic number.

It is not a de Polignac number, because 240153257 - 2² = 240153253 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (240153253) 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, 120076628 + 120076629.

It is an arithmetic number, because the mean of its divisors is an integer number (120076629).

Almost surely, 2^240153257 is an apocalyptic number.

It is an amenable number.

240153257 is a deficient number, since it is larger than the sum of its proper divisors (1).

240153257 is an equidigital number, since it uses as much as digits as its factorization.

240153257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 240153257 is about 15496.8789438390. The cubic root of 240153257 is about 621.5787522476.

It can be divided in two parts, 24015 and 3257, that added together give a palindrome (27272).

The spelling of 240153257 in words is "two hundred forty million, one hundred fifty-three thousand, two hundred fifty-seven".