7342604721 has 15 divisors (see below), whose sum is σ = 10969734523. Its totient is φ = 4894555680.

The previous prime is 7342604641. The next prime is 7342604729. The reversal of 7342604721 is 1274062437.

The square root of 7342604721 is 85689.

It is a perfect power (a square), and thus also a powerful number.

7342604721 is a `hidden beast` number, since 7 + 3 + 42 + 604 + 7 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3236358321 + 4106246400 = 56889^2 + 64080^2 .

It is not a de Polignac number, because 7342604721 - 2⁷ = 7342604593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7342604729) 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 14 ways as a sum of consecutive naturals, for example, 766441 + ... + 775961.

Almost surely, 2^7342604721 is an apocalyptic number.

7342604721 is the 85689-th square number.

7342604721 is the 42845-th centered octagonal number.

It is an amenable number.

7342604721 is a deficient number, since it is larger than the sum of its proper divisors (3627129802).

7342604721 is an frugal number, since it uses more digits than its factorization.

7342604721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19054 (or 9524 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The cubic root of 7342604721 is about 1943.6439748677.

Multiplying 7342604721 by its sum of digits (36), we get a square (264333769956 = 514134²).

The spelling of 7342604721 in words is "seven billion, three hundred forty-two million, six hundred four thousand, seven hundred twenty-one".