8130722 has 4 divisors (see below), whose sum is σ = 12196086. Its totient is φ = 4065360.

The previous prime is 8130721. The next prime is 8130737. The reversal of 8130722 is 2270318.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2270318 = 2 ⋅1135159.

It can be written as a sum of positive squares in only one way, i.e., 6145441 + 1985281 = 2479^2 + 1409^2 .

It is a super-2 number, since 2×8130722² = 132217280482568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8130721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2032679 + ... + 2032682.

Almost surely, 2^8130722 is an apocalyptic number.

8130722 is a deficient number, since it is larger than the sum of its proper divisors (4065364).

8130722 is a wasteful number, since it uses less digits than its factorization.

8130722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4065363.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 8130722 is about 2851.4420912935. The cubic root of 8130722 is about 201.0834698661.

It can be divided in two parts, 81 and 30722, that added together give a palindrome (30803).

The spelling of 8130722 in words is "eight million, one hundred thirty thousand, seven hundred twenty-two".