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258995 = 51117277
BaseRepresentation
bin111111001110110011
3111011021102
4333032303
531241440
65315015
72126042
oct771663
9434242
10258995
11167650
12105a6b
1390b69
146a559
1551b15
hex3f3b3

258995 has 16 divisors (see below), whose sum is σ = 360288. Its totient is φ = 176640.

The previous prime is 258991. The next prime is 259001. The reversal of 258995 is 599852.

It is a happy number.

258995 is nontrivially palindromic in base 15.

It is not a de Polignac number, because 258995 - 22 = 258991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 258995.

It is not an unprimeable number, because it can be changed into a prime (258991) 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 15 ways as a sum of consecutive naturals, for example, 797 + ... + 1073.

It is an arithmetic number, because the mean of its divisors is an integer number (22518).

2258995 is an apocalyptic number.

258995 is a deficient number, since it is larger than the sum of its proper divisors (101293).

258995 is a wasteful number, since it uses less digits than its factorization.

With its successor (258996) it forms an eRAP, since the sums of their prime factors are consecutive (310 and 311).

258995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310.

The product of its digits is 32400, while the sum is 38.

The square root of 258995 is about 508.9155136169. The cubic root of 258995 is about 63.7427006893.

The spelling of 258995 in words is "two hundred fifty-eight thousand, nine hundred ninety-five".

Divisors: 1 5 11 17 55 85 187 277 935 1385 3047 4709 15235 23545 51799 258995