7021505 has 8 divisors (see below), whose sum is σ = 8541672. Its totient is φ = 5539968.

The previous prime is 7021501. The next prime is 7021519. The reversal of 7021505 is 5051207.

7021505 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 141376 + 6880129 = 376^2 + 2623^2 .

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 7021505 - 2² = 7021501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7021501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9254 + ... + 9983.

It is an arithmetic number, because the mean of its divisors is an integer number (1067709).

Almost surely, 2^7021505 is an apocalyptic number.

It is an amenable number.

7021505 is a deficient number, since it is larger than the sum of its proper divisors (1520167).

7021505 is a wasteful number, since it uses less digits than its factorization.

7021505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19315.

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 7021505 is about 2649.8122575005. The cubic root of 7021505 is about 191.4888112772.

The spelling of 7021505 in words is "seven million, twenty-one thousand, five hundred five".