7003421 has 2 divisors, whose sum is σ = 7003422. Its totient is φ = 7003420.

The previous prime is 7003411. The next prime is 7003463. The reversal of 7003421 is 1243007.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6996025 + 7396 = 2645^2 + 86^2 .

It is a cyclic number.

It is not a de Polignac number, because 7003421 - 2⁶ = 7003357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7003421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7003411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3501710 + 3501711.

It is an arithmetic number, because the mean of its divisors is an integer number (3501711).

Almost surely, 2^7003421 is an apocalyptic number.

It is an amenable number.

7003421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7003421 is an equidigital number, since it uses as much as digits as its factorization.

7003421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 7003421 is about 2646.3977403255. The cubic root of 7003421 is about 191.3242757620.

Adding to 7003421 its reverse (1243007), we get a palindrome (8246428).

The spelling of 7003421 in words is "seven million, three thousand, four hundred twenty-one".