7182740321 has 4 divisors (see below), whose sum is σ = 7182986772. Its totient is φ = 7182493872.

The previous prime is 7182740281. The next prime is 7182740333. The reversal of 7182740321 is 1230472817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1230472817 = 7 ⋅175781831.

It can be written as a sum of positive squares in 2 ways, for example, as 5405190400 + 1777549921 = 73520^2 + 42161^2 .

It is a cyclic number.

It is not a de Polignac number, because 7182740321 - 2¹⁴ = 7182723937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7182740351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72566 + ... + 140111.

It is an arithmetic number, because the mean of its divisors is an integer number (1795746693).

Almost surely, 2^7182740321 is an apocalyptic number.

It is an amenable number.

7182740321 is a deficient number, since it is larger than the sum of its proper divisors (246451).

7182740321 is a wasteful number, since it uses less digits than its factorization.

7182740321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246450.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 7182740321 is about 84751.0490849523. The cubic root of 7182740321 is about 1929.4345682696.

The spelling of 7182740321 in words is "seven billion, one hundred eighty-two million, seven hundred forty thousand, three hundred twenty-one".