7021243 has 4 divisors (see below), whose sum is σ = 7028208. Its totient is φ = 7014280.

The previous prime is 7021237. The next prime is 7021249. The reversal of 7021243 is 3421207.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (7021237) and next prime (7021249).

It is a cyclic number.

It is not a de Polignac number, because 7021243 - 2⁵ = 7021211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7021243.

It is not an unprimeable number, because it can be changed into a prime (7021249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1648 + ... + 4093.

It is an arithmetic number, because the mean of its divisors is an integer number (1757052).

Almost surely, 2^7021243 is an apocalyptic number.

7021243 is a deficient number, since it is larger than the sum of its proper divisors (6965).

7021243 is a wasteful number, since it uses less digits than its factorization.

7021243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6964.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 7021243 is about 2649.7628195746. The cubic root of 7021243 is about 191.4864295137.

The spelling of 7021243 in words is "seven million, twenty-one thousand, two hundred forty-three".