7472545021 has 4 divisors (see below), whose sum is σ = 7538673852. Its totient is φ = 7406416192.

The previous prime is 7472545019. The next prime is 7472545033. The reversal of 7472545021 is 1205452747.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1205452747 = 23 ⋅52410989.

It can be written as a sum of positive squares in 2 ways, for example, as 708304996 + 6764240025 = 26614^2 + 82245^2 .

It is a cyclic number.

It is not a de Polignac number, because 7472545021 - 2¹ = 7472545019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7472545921) 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, 33064246 + ... + 33064471.

It is an arithmetic number, because the mean of its divisors is an integer number (1884668463).

Almost surely, 2^7472545021 is an apocalyptic number.

It is an amenable number.

7472545021 is a deficient number, since it is larger than the sum of its proper divisors (66128831).

7472545021 is a wasteful number, since it uses less digits than its factorization.

7472545021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66128830.

The product of its (nonzero) digits is 78400, while the sum is 37.

The square root of 7472545021 is about 86443.8836529225. The cubic root of 7472545021 is about 1955.0423977217.

Adding to 7472545021 its reverse (1205452747), we get a palindrome (8677997768).

The spelling of 7472545021 in words is "seven billion, four hundred seventy-two million, five hundred forty-five thousand, twenty-one".