7042398561 has 27 divisors (see below), whose sum is σ = 11185580497. Its totient is φ = 4266441960.

The previous prime is 7042398527. The next prime is 7042398581. The reversal of 7042398561 is 1658932407.

The square root of 7042398561 is 83919.

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

7042398561 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7042398561 - 2⁹ = 7042398049 is a prime.

It is a Duffinian number.

7042398561 is strictly pandigital in base 10.

It is not an unprimeable number, because it can be changed into a prime (7042398511) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2768056 + ... + 2770598.

It is a 1-persistent number, because it is pandigital, but 2⋅7042398561 = 14084797122 is not.

Almost surely, 2^7042398561 is an apocalyptic number.

7042398561 is the 83919-th square number.

7042398561 is the 41960-th centered octagonal number.

It is an amenable number.

7042398561 is a deficient number, since it is larger than the sum of its proper divisors (4143181936).

7042398561 is an equidigital number, since it uses as much as digits as its factorization.

7042398561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5114 (or 2557 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The cubic root of 7042398561 is about 1916.7855793377.

The spelling of 7042398561 in words is "seven billion, forty-two million, three hundred ninety-eight thousand, five hundred sixty-one".