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79121 = 789127
BaseRepresentation
bin10011010100010001
311000112102
4103110101
510012441
61410145
7446450
oct232421
9130472
1079121
1154499
1239955
132a023
1420b97
151869b
hex13511

79121 has 8 divisors (see below), whose sum is σ = 92160. Its totient is φ = 66528.

The previous prime is 79111. The next prime is 79133. The reversal of 79121 is 12197.

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

It is a de Polignac number, because none of the positive numbers 2k-79121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 79093 and 79102.

It is not an unprimeable number, because it can be changed into a prime (79111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560 + ... + 686.

It is an arithmetic number, because the mean of its divisors is an integer number (11520).

279121 is an apocalyptic number.

It is an amenable number.

79121 is a deficient number, since it is larger than the sum of its proper divisors (13039).

79121 is a wasteful number, since it uses less digits than its factorization.

79121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223.

The product of its digits is 126, while the sum is 20.

The square root of 79121 is about 281.2845534330. The cubic root of 79121 is about 42.9302999177.

It can be divided in two parts, 79 and 121, that multiplied together give a palindrome (9559).

The spelling of 79121 in words is "seventy-nine thousand, one hundred twenty-one".

Divisors: 1 7 89 127 623 889 11303 79121