7242547538 has 8 divisors (see below), whose sum is σ = 10878174732. Its totient is φ = 3616489296.

The previous prime is 7242547531. The next prime is 7242547561. The reversal of 7242547538 is 8357452427.

It can be written as a sum of positive squares in 2 ways, for example, as 6976759729 + 265787809 = 83527^2 + 16303^2 .

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

It is a super-2 number, since 2×7242547538² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7242547492 and 7242547501.

It is not an unprimeable number, because it can be changed into a prime (7242547531) 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, 2390345 + ... + 2393372.

Almost surely, 2^7242547538 is an apocalyptic number.

7242547538 is a deficient number, since it is larger than the sum of its proper divisors (3635627194).

7242547538 is a wasteful number, since it uses less digits than its factorization.

7242547538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784476.

The product of its digits is 1881600, while the sum is 47.

The square root of 7242547538 is about 85103.1582140169. The cubic root of 7242547538 is about 1934.7749306334.

The spelling of 7242547538 in words is "seven billion, two hundred forty-two million, five hundred forty-seven thousand, five hundred thirty-eight".