7342707521 has 4 divisors (see below), whose sum is σ = 7342917252. Its totient is φ = 7342497792.

The previous prime is 7342707517. The next prime is 7342707553. The reversal of 7342707521 is 1257072437.

7342707521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53816896 + 7288890625 = 7336^2 + 85375^2 .

It is a cyclic number.

It is not a de Polignac number, because 7342707521 - 2² = 7342707517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7342707221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38240 + ... + 127073.

It is an arithmetic number, because the mean of its divisors is an integer number (1835729313).

Almost surely, 2^7342707521 is an apocalyptic number.

It is an amenable number.

7342707521 is a deficient number, since it is larger than the sum of its proper divisors (209731).

7342707521 is a wasteful number, since it uses less digits than its factorization.

7342707521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209730.

The product of its (nonzero) digits is 82320, while the sum is 38.

The square root of 7342707521 is about 85689.5998415210. The cubic root of 7342707521 is about 1943.6530454757.

Adding to 7342707521 its reverse (1257072437), we get a palindrome (8599779958).

The spelling of 7342707521 in words is "seven billion, three hundred forty-two million, seven hundred seven thousand, five hundred twenty-one".