7072521061 has 4 divisors (see below), whose sum is σ = 7142546124. Its totient is φ = 7002496000.

The previous prime is 7072521041. The next prime is 7072521119. The reversal of 7072521061 is 1601252707.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1601252707 = 3307 ⋅484201.

It can be written as a sum of positive squares in 2 ways, for example, as 4006130436 + 3066390625 = 63294^2 + 55375^2 .

It is a cyclic number.

It is not a de Polignac number, because 7072521061 - 2⁹ = 7072520549 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7072521011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35012380 + ... + 35012581.

It is an arithmetic number, because the mean of its divisors is an integer number (1785636531).

Almost surely, 2^7072521061 is an apocalyptic number.

It is an amenable number.

7072521061 is a deficient number, since it is larger than the sum of its proper divisors (70025063).

7072521061 is a wasteful number, since it uses less digits than its factorization.

7072521061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70025062.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 7072521061 is about 84098.2821524911. The cubic root of 7072521061 is about 1919.5145854946.

Adding to 7072521061 its reverse (1601252707), we get a palindrome (8673773768).

The spelling of 7072521061 in words is "seven billion, seventy-two million, five hundred twenty-one thousand, sixty-one".