Search a number
-
+
530881 = 1397421
BaseRepresentation
bin10000001100111000001
3222222020021
42001213001
5113442011
615213441
74340521
oct2014701
9888207
10530881
1133294a
12217281
13157840
14db681
15a7471
hex819c1

530881 has 8 divisors (see below), whose sum is σ = 578984. Its totient is φ = 483840.

The previous prime is 530869. The next prime is 530897. The reversal of 530881 is 188035.

It can be written as a sum of positive squares in 4 ways, for example, as 18225 + 512656 = 135^2 + 716^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 3-Lehmer number, since φ(530881) divides (530881-1)3.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 530881 - 27 = 530753 is a prime.

It is a super-2 number, since 2×5308812 = 563669272322, which contains 22 as substring.

It is a deceptive number, since it divides R530880.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (530851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1051 + ... + 1471.

It is an arithmetic number, because the mean of its divisors is an integer number (72373).

It is a Poulet number, since it divides 2530880-1.

2530881 is an apocalyptic number.

530881 is the 421-st octagonal number.

It is an amenable number.

530881 is a deficient number, since it is larger than the sum of its proper divisors (48103).

530881 is a wasteful number, since it uses less digits than its factorization.

530881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 530881 is about 728.6158109731. The cubic root of 530881 is about 80.9715390533.

The spelling of 530881 in words is "five hundred thirty thousand, eight hundred eighty-one".

Divisors: 1 13 97 421 1261 5473 40837 530881