7040721 has 8 divisors (see below), whose sum is σ = 9401184. Its totient is φ = 4687040.

The previous prime is 7040713. The next prime is 7040723. The reversal of 7040721 is 1270407.

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

It is a cyclic number.

It is not a de Polignac number, because 7040721 - 2³ = 7040713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7040723) 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, 1705 + ... + 4121.

It is an arithmetic number, because the mean of its divisors is an integer number (1175148).

Almost surely, 2^7040721 is an apocalyptic number.

It is an amenable number.

7040721 is a deficient number, since it is larger than the sum of its proper divisors (2360463).

7040721 is a wasteful number, since it uses less digits than its factorization.

7040721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 7040721 is about 2653.4356973554. The cubic root of 7040721 is about 191.6633368882.

The spelling of 7040721 in words is "seven million, forty thousand, seven hundred twenty-one".