240071257 has 2 divisors, whose sum is σ = 240071258. Its totient is φ = 240071256.

The previous prime is 240071239. The next prime is 240071261. The reversal of 240071257 is 752170042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215825481 + 24245776 = 14691^2 + 4924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240071257 is a prime.

It is not a weakly prime, because it can be changed into another prime (240071287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120035628 + 120035629.

It is an arithmetic number, because the mean of its divisors is an integer number (120035629).

Almost surely, 2^240071257 is an apocalyptic number.

It is an amenable number.

240071257 is a deficient number, since it is larger than the sum of its proper divisors (1).

240071257 is an equidigital number, since it uses as much as digits as its factorization.

240071257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 240071257 is about 15494.2330239351. The cubic root of 240071257 is about 621.5079984568.

The spelling of 240071257 in words is "two hundred forty million, seventy-one thousand, two hundred fifty-seven".