Search a number
-
+
162042581 is a prime number
BaseRepresentation
bin10011010100010…
…01001011010101
3102021220121122002
421222021023111
5312440330311
624025045045
74005224231
oct1152111325
9367817562
10162042581
1183517a98
1246326785
13277573ac
14177415c1
15e35c93b
hex9a892d5

162042581 has 2 divisors, whose sum is σ = 162042582. Its totient is φ = 162042580.

The previous prime is 162042577. The next prime is 162042637. The reversal of 162042581 is 185240261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144985681 + 17056900 = 12041^2 + 4130^2 .

It is an emirp because it is prime and its reverse (185240261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162042581 - 22 = 162042577 is a prime.

It is a super-2 number, since 2×1620425812 = 52515596114283122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162042541) 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 as a sum of consecutive naturals, namely, 81021290 + 81021291.

It is an arithmetic number, because the mean of its divisors is an integer number (81021291).

Almost surely, 2162042581 is an apocalyptic number.

It is an amenable number.

162042581 is a deficient number, since it is larger than the sum of its proper divisors (1).

162042581 is an equidigital number, since it uses as much as digits as its factorization.

162042581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 162042581 is about 12729.5946911125. The cubic root of 162042581 is about 545.1839358952.

The spelling of 162042581 in words is "one hundred sixty-two million, forty-two thousand, five hundred eighty-one".