7004421 has 16 divisors (see below), whose sum is σ = 10555200. Its totient is φ = 4589424.

The previous prime is 7004401. The next prime is 7004429. The reversal of 7004421 is 1244007.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-7004421 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7004394 and 7004403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7004429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 606 + ... + 3791.

It is an arithmetic number, because the mean of its divisors is an integer number (659700).

Almost surely, 2^7004421 is an apocalyptic number.

It is an amenable number.

7004421 is a deficient number, since it is larger than the sum of its proper divisors (3550779).

7004421 is a wasteful number, since it uses less digits than its factorization.

7004421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4465 (or 4459 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 7004421 is about 2646.5866696558. The cubic root of 7004421 is about 191.3333815580. Note that the first 4 decimals are identical.

Adding to 7004421 its reverse (1244007), we get a palindrome (8248428).

The spelling of 7004421 in words is "seven million, four thousand, four hundred twenty-one".