258461995 has 16 divisors (see below), whose sum is σ = 339844320. Its totient is φ = 187142400.

The previous prime is 258461993. The next prime is 258462013. The reversal of 258461995 is 599164852.

It is not a de Polignac number, because 258461995 - 2¹ = 258461993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (258461993) 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 in 15 ways as a sum of consecutive naturals, for example, 2335 + ... + 22855.

It is an arithmetic number, because the mean of its divisors is an integer number (21240270).

Almost surely, 2^258461995 is an apocalyptic number.

258461995 is a deficient number, since it is larger than the sum of its proper divisors (81382325).

258461995 is a wasteful number, since it uses less digits than its factorization.

258461995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20766.

The product of its digits is 777600, while the sum is 49.

The square root of 258461995 is about 16076.7532480909. The cubic root of 258461995 is about 636.9894371648.

The spelling of 258461995 in words is "two hundred fifty-eight million, four hundred sixty-one thousand, nine hundred ninety-five".