Search a number
70081 = 1123277
BaseRepresentation
bin10001000111000001
310120010121
4101013001
54220311
61300241
7411214
oct210701
9116117
1070081
1148720
1234681
1325b8b
141b77b
1515b71
hex111c1

70081 has 8 divisors (see below), whose sum is σ = 80064. Its totient is φ = 60720.

The previous prime is 70079. The next prime is 70099. The reversal of 70081 is 18007.

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

It is not a de Polignac number, because 70081 - 21 = 70079 is a prime.

It is a super-2 number, since 2×700812 = 9822693122, which contains 22 as substring.

It is a Duffinian number.

70081 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115 + ... + 391.

It is an arithmetic number, because the mean of its divisors is an integer number (10008).

270081 is an apocalyptic number.

It is an amenable number.

70081 is a deficient number, since it is larger than the sum of its proper divisors (9983).

70081 is a wasteful number, since it uses less digits than its factorization.

70081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 70081 is about 264.7281624610. The cubic root of 70081 is about 41.2287432567.

Adding to 70081 its reverse (18007), we get a palindrome (88088).

The spelling of 70081 in words is "seventy thousand, eighty-one".

Divisors: 1 11 23 253 277 3047 6371 70081