258130721 has 4 divisors (see below), whose sum is σ = 263622912. Its totient is φ = 252638532.

The previous prime is 258130687. The next prime is 258130727. The reversal of 258130721 is 127031852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258130721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (258130727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2746025 + ... + 2746118.

It is an arithmetic number, because the mean of its divisors is an integer number (65905728).

Almost surely, 2^258130721 is an apocalyptic number.

It is an amenable number.

258130721 is a deficient number, since it is larger than the sum of its proper divisors (5492191).

258130721 is an equidigital number, since it uses as much as digits as its factorization.

258130721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5492190.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 258130721 is about 16066.4470558988. The cubic root of 258130721 is about 636.7171750115.

The spelling of 258130721 in words is "two hundred fifty-eight million, one hundred thirty thousand, seven hundred twenty-one".