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2281289 = 4015689
BaseRepresentation
bin1000101100111101001001
311021220100012
420230331021
51041000124
6120521305
725250663
oct10547511
94256305
102281289
111318a6a
12920235
1361b49a
14435533
15300e0e
hex22cf49

2281289 has 4 divisors (see below), whose sum is σ = 2287380. Its totient is φ = 2275200.

The previous prime is 2281277. The next prime is 2281291. The reversal of 2281289 is 9821822.

2281289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2226064 + 55225 = 1492^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 2281289 - 28 = 2281033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2281219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2444 + ... + 3245.

It is an arithmetic number, because the mean of its divisors is an integer number (571845).

22281289 is an apocalyptic number.

It is an amenable number.

2281289 is a deficient number, since it is larger than the sum of its proper divisors (6091).

2281289 is an equidigital number, since it uses as much as digits as its factorization.

2281289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6090.

The product of its digits is 4608, while the sum is 32.

The square root of 2281289 is about 1510.3936572960. The cubic root of 2281289 is about 131.6416858730.

The spelling of 2281289 in words is "two million, two hundred eighty-one thousand, two hundred eighty-nine".

Divisors: 1 401 5689 2281289