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5106721 = 13936739
BaseRepresentation
bin10011011110110000100001
3100121110002211
4103132300201
52301403341
6301242121
761256254
oct23366041
910543084
105106721
112978834
121863341
13109a539
1496d09b
156ad181
hex4dec21

5106721 has 4 divisors (see below), whose sum is σ = 5143600. Its totient is φ = 5069844.

The previous prime is 5106719. The next prime is 5106757. The reversal of 5106721 is 1276015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5106721 - 21 = 5106719 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5106692 and 5106701.

It is not an unprimeable number, because it can be changed into a prime (5106701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18231 + ... + 18508.

It is an arithmetic number, because the mean of its divisors is an integer number (1285900).

Almost surely, 25106721 is an apocalyptic number.

It is an amenable number.

5106721 is a deficient number, since it is larger than the sum of its proper divisors (36879).

5106721 is a wasteful number, since it uses less digits than its factorization.

5106721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36878.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 5106721 is about 2259.8055226059. The cubic root of 5106721 is about 172.2056423550.

The spelling of 5106721 in words is "five million, one hundred six thousand, seven hundred twenty-one".

Divisors: 1 139 36739 5106721