265242139 has 2 divisors, whose sum is σ = 265242140. Its totient is φ = 265242138.

The previous prime is 265242127. The next prime is 265242151. The reversal of 265242139 is 931242562.

It is a balanced prime because it is at equal distance from previous prime (265242127) and next prime (265242151).

It is a cyclic number.

It is not a de Polignac number, because 265242139 - 2¹¹ = 265240091 is a prime.

It is equal to p_14466292 and since 265242139 and 14466292 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (265242199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132621069 + 132621070.

It is an arithmetic number, because the mean of its divisors is an integer number (132621070).

Almost surely, 2^265242139 is an apocalyptic number.

265242139 is a deficient number, since it is larger than the sum of its proper divisors (1).

265242139 is an equidigital number, since it uses as much as digits as its factorization.

265242139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 34.

The square root of 265242139 is about 16286.2561382289. The cubic root of 265242139 is about 642.5114041590.

The spelling of 265242139 in words is "two hundred sixty-five million, two hundred forty-two thousand, one hundred thirty-nine".