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7000081 = 115312007
BaseRepresentation
bin11010101101000000010001
3111011122022021
4122231000101
53243000311
6410011441
7113333254
oct32550021
914148267
107000081
113a512a0
122416b81
1315b127a
14d0309b
15934171
hex6ad011

7000081 has 8 divisors (see below), whose sum is σ = 7781184. Its totient is φ = 6243120.

The previous prime is 7000069. The next prime is 7000087. The reversal of 7000081 is 1800007.

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

It is a cyclic number.

It is not a de Polignac number, because 7000081 - 213 = 6991889 is a prime.

It is a super-4 number, since 4×70000814 (a number of 28 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7000087) 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, 5421 + ... + 6586.

It is an arithmetic number, because the mean of its divisors is an integer number (972648).

Almost surely, 27000081 is an apocalyptic number.

It is an amenable number.

7000081 is a deficient number, since it is larger than the sum of its proper divisors (781103).

7000081 is a wasteful number, since it uses less digits than its factorization.

7000081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12071.

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

The square root of 7000081 is about 2645.7666185815. The cubic root of 7000081 is about 191.2938561193.

Adding to 7000081 its reverse (1800007), we get a palindrome (8800088).

The spelling of 7000081 in words is "seven million, eighty-one", and thus it is an aban number and an uban number.

Divisors: 1 11 53 583 12007 132077 636371 7000081