7030021 has 4 divisors (see below), whose sum is σ = 7109100. Its totient is φ = 6950944.

The previous prime is 7030013. The next prime is 7030033. The reversal of 7030021 is 1200307.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3648100 + 3381921 = 1910^2 + 1839^2 .

It is a cyclic number.

It is not a de Polignac number, because 7030021 - 2³ = 7030013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7029983 and 7030010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7030091) 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, 39406 + ... + 39583.

It is an arithmetic number, because the mean of its divisors is an integer number (1777275).

Almost surely, 2^7030021 is an apocalyptic number.

It is an amenable number.

7030021 is a deficient number, since it is larger than the sum of its proper divisors (79079).

7030021 is an equidigital number, since it uses as much as digits as its factorization.

7030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79078.

The product of its (nonzero) digits is 42, while the sum is 13.

The square root of 7030021 is about 2651.4186768596. The cubic root of 7030021 is about 191.5661954416.

Adding to 7030021 its reverse (1200307), we get a palindrome (8230328).

The spelling of 7030021 in words is "seven million, thirty thousand, twenty-one".