Search a number
-
+
7712081 = 131931223
BaseRepresentation
bin11101011010110101010001
3112111210222122
4131122311101
53433241311
6433144025
7122360126
oct35326521
915453878
107712081
114398223
1226bb015
1317a0380
14104a74d
15a250db
hex75ad51

7712081 has 8 divisors (see below), whose sum is σ = 8742720. Its totient is φ = 6743952.

The previous prime is 7712071. The next prime is 7712099. The reversal of 7712081 is 1802177.

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 7712081 - 210 = 7711057 is a prime.

It is a super-2 number, since 2×77120812 = 118952386701122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7712081.

It is not an unprimeable number, because it can be changed into a prime (7712011) 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 in 7 ways as a sum of consecutive naturals, for example, 15365 + ... + 15858.

It is an arithmetic number, because the mean of its divisors is an integer number (1092840).

Almost surely, 27712081 is an apocalyptic number.

It is an amenable number.

7712081 is a deficient number, since it is larger than the sum of its proper divisors (1030639).

7712081 is a wasteful number, since it uses less digits than its factorization.

7712081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31255.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 7712081 is about 2777.0633770226. The cubic root of 7712081 is about 197.5713015002.

The spelling of 7712081 in words is "seven million, seven hundred twelve thousand, eighty-one".

Divisors: 1 13 19 247 31223 405899 593237 7712081