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321121 = 3171013
BaseRepresentation
bin1001110011001100001
3121022111101
41032121201
540233441
610514401
72505133
oct1163141
9538441
10321121
111aa299
12135a01
13b3218
1485053
1565231
hex4e661

321121 has 4 divisors (see below), whose sum is σ = 322452. Its totient is φ = 319792.

The previous prime is 321109. The next prime is 321143. The reversal of 321121 is 121123.

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 6400 + 314721 = 80^2 + 561^2 .

It is a cyclic number.

It is not a de Polignac number, because 321121 - 29 = 320609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321098 and 321107.

It is not an unprimeable number, because it can be changed into a prime (321221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190 + ... + 823.

It is an arithmetic number, because the mean of its divisors is an integer number (80613).

2321121 is an apocalyptic number.

It is an amenable number.

321121 is a deficient number, since it is larger than the sum of its proper divisors (1331).

321121 is a wasteful number, since it uses less digits than its factorization.

321121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330.

The product of its digits is 12, while the sum is 10.

The square root of 321121 is about 566.6753920897. The cubic root of 321121 is about 68.4788149097.

Adding to 321121 its reverse (121123), we get a palindrome (442244).

The spelling of 321121 in words is "three hundred twenty-one thousand, one hundred twenty-one", and thus it is an iban number.

Divisors: 1 317 1013 321121