265798457 has 2 divisors, whose sum is σ = 265798458. Its totient is φ = 265798456.

The previous prime is 265798409. The next prime is 265798471. The reversal of 265798457 is 754897562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250557241 + 15241216 = 15829^2 + 3904^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265798457 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 265798399 and 265798408.

It is not a weakly prime, because it can be changed into another prime (265798157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132899228 + 132899229.

It is an arithmetic number, because the mean of its divisors is an integer number (132899229).

Almost surely, 2^265798457 is an apocalyptic number.

It is an amenable number.

265798457 is a deficient number, since it is larger than the sum of its proper divisors (1).

265798457 is an equidigital number, since it uses as much as digits as its factorization.

265798457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4233600, while the sum is 53.

The square root of 265798457 is about 16303.3265623921. The cubic root of 265798457 is about 642.9602909173.

The spelling of 265798457 in words is "two hundred sixty-five million, seven hundred ninety-eight thousand, four hundred fifty-seven".