7245938721 has 8 divisors (see below), whose sum is σ = 11041430464. Its totient is φ = 4140536400.

The previous prime is 7245938719. The next prime is 7245938737. The reversal of 7245938721 is 1278395427.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7245938721 - 2¹ = 7245938719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7245938221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172522330 + ... + 172522371.

It is an arithmetic number, because the mean of its divisors is an integer number (1380178808).

Almost surely, 2^7245938721 is an apocalyptic number.

It is an amenable number.

7245938721 is a deficient number, since it is larger than the sum of its proper divisors (3795491743).

7245938721 is a wasteful number, since it uses less digits than its factorization.

7245938721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345044711.

The product of its digits is 846720, while the sum is 48.

The square root of 7245938721 is about 85123.0798373743. The cubic root of 7245938721 is about 1935.0768571787.

The spelling of 7245938721 in words is "seven billion, two hundred forty-five million, nine hundred thirty-eight thousand, seven hundred twenty-one".