7021543 has 2 divisors, whose sum is σ = 7021544. Its totient is φ = 7021542.

The previous prime is 7021541. The next prime is 7021549. The reversal of 7021543 is 3451207.

It is a weak prime.

It is an emirp because it is prime and its reverse (3451207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7021543 - 2¹ = 7021541 is a prime.

It is a super-2 number, since 2×7021543² = 98604132201698, which contains 22 as substring.

Together with 7021541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7021541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3510771 + 3510772.

It is an arithmetic number, because the mean of its divisors is an integer number (3510772).

Almost surely, 2^7021543 is an apocalyptic number.

7021543 is a deficient number, since it is larger than the sum of its proper divisors (1).

7021543 is an equidigital number, since it uses as much as digits as its factorization.

7021543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 7021543 is about 2649.8194278101. The cubic root of 7021543 is about 191.4891567189.

The spelling of 7021543 in words is "seven million, twenty-one thousand, five hundred forty-three".