7042720 has 24 divisors (see below), whose sum is σ = 16638804. Its totient is φ = 2817024.

The previous prime is 7042681. The next prime is 7042723. The reversal of 7042720 is 272407.

It can be written as a sum of positive squares in 2 ways, for example, as 6990736 + 51984 = 2644^2 + 228^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7042691 and 7042700.

It is not an unprimeable number, because it can be changed into a prime (7042723) 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, 21849 + ... + 22168.

Almost surely, 2^7042720 is an apocalyptic number.

It is an amenable number.

7042720 is an abundant number, since it is smaller than the sum of its proper divisors (9596084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7042720 is a wasteful number, since it uses less digits than its factorization.

7042720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44032 (or 44024 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 7042720 is about 2653.8123520701. The cubic root of 7042720 is about 191.6814741763.

The spelling of 7042720 in words is "seven million, forty-two thousand, seven hundred twenty".