258640127 has 2 divisors, whose sum is σ = 258640128. Its totient is φ = 258640126.

The previous prime is 258640111. The next prime is 258640139. The reversal of 258640127 is 721046852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 258640127 - 2⁴ = 258640111 is a prime.

It is a super-2 number, since 2×258640127² = 133789430589152258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258640927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129320063 + 129320064.

It is an arithmetic number, because the mean of its divisors is an integer number (129320064).

Almost surely, 2^258640127 is an apocalyptic number.

258640127 is a deficient number, since it is larger than the sum of its proper divisors (1).

258640127 is an equidigital number, since it uses as much as digits as its factorization.

258640127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 258640127 is about 16082.2923428223. The cubic root of 258640127 is about 637.1357412600.

Adding to 258640127 its reverse (721046852), we get a palindrome (979686979).

The spelling of 258640127 in words is "two hundred fifty-eight million, six hundred forty thousand, one hundred twenty-seven".