240774257 has 2 divisors, whose sum is σ = 240774258. Its totient is φ = 240774256.

The previous prime is 240774253. The next prime is 240774299. The reversal of 240774257 is 752477042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208975936 + 31798321 = 14456^2 + 5639^2 .

It is a cyclic number.

It is not a de Polignac number, because 240774257 - 2² = 240774253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240774257.

It is not a weakly prime, because it can be changed into another prime (240774253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120387128 + 120387129.

It is an arithmetic number, because the mean of its divisors is an integer number (120387129).

Almost surely, 2^240774257 is an apocalyptic number.

It is an amenable number.

240774257 is a deficient number, since it is larger than the sum of its proper divisors (1).

240774257 is an equidigital number, since it uses as much as digits as its factorization.

240774257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109760, while the sum is 38.

The square root of 240774257 is about 15516.9023003949. The cubic root of 240774257 is about 622.1140606505.

The spelling of 240774257 in words is "two hundred forty million, seven hundred seventy-four thousand, two hundred fifty-seven".