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1681085 = 57431117
BaseRepresentation
bin110011010011010111101
310011102000102
412122122331
5412243320
6100010445
720201060
oct6323275
93142012
101681085
11a4902a
12690a25
1346b233
1431a8d7
15233175
hex19a6bd

1681085 has 16 divisors (see below), whose sum is σ = 2361216. Its totient is φ = 1124928.

The previous prime is 1681073. The next prime is 1681091. The reversal of 1681085 is 5801861.

It is not a de Polignac number, because 1681085 - 214 = 1664701 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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, 947 + ... + 2063.

It is an arithmetic number, because the mean of its divisors is an integer number (147576).

21681085 is an apocalyptic number.

It is an amenable number.

1681085 is a deficient number, since it is larger than the sum of its proper divisors (680131).

1681085 is a wasteful number, since it uses less digits than its factorization.

1681085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 1681085 is about 1296.5666199621. The cubic root of 1681085 is about 118.9040254341.

The spelling of 1681085 in words is "one million, six hundred eighty-one thousand, eighty-five".

Divisors: 1 5 7 35 43 215 301 1117 1505 5585 7819 39095 48031 240155 336217 1681085