Search a number
-
+
7130521 = 9197759
BaseRepresentation
bin11011001100110110011001
3111102021020101
4123030312121
53311134041
6412455401
7114415456
oct33146631
914367211
107130521
1140302a2
12247a561
131628758
14d3882d
1595cb31
hex6ccd99

7130521 has 4 divisors (see below), whose sum is σ = 7139200. Its totient is φ = 7121844.

The previous prime is 7130509. The next prime is 7130533. The reversal of 7130521 is 1250317.

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 an interprime number because it is at equal distance from previous prime (7130509) and next prime (7130533).

It is a cyclic number.

It is not a de Polignac number, because 7130521 - 25 = 7130489 is a prime.

It is a Duffinian number.

7130521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7130551) 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 3 ways as a sum of consecutive naturals, for example, 2961 + ... + 4798.

It is an arithmetic number, because the mean of its divisors is an integer number (1784800).

Almost surely, 27130521 is an apocalyptic number.

It is an amenable number.

7130521 is a deficient number, since it is larger than the sum of its proper divisors (8679).

7130521 is an equidigital number, since it uses as much as digits as its factorization.

7130521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8678.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 7130521 is about 2670.3035407983. The cubic root of 7130521 is about 192.4747456610.

Adding to 7130521 its reverse (1250317), we get a palindrome (8380838).

The spelling of 7130521 in words is "seven million, one hundred thirty thousand, five hundred twenty-one".

Divisors: 1 919 7759 7130521