7017421 has 4 divisors (see below), whose sum is σ = 7033500. Its totient is φ = 7001344.

The previous prime is 7017419. The next prime is 7017431. The reversal of 7017421 is 1247107.

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 6180196 + 837225 = 2486^2 + 915^2 .

It is a cyclic number.

It is not a de Polignac number, because 7017421 - 2¹ = 7017419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7017392 and 7017401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7017431) 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, 7366 + ... + 8263.

It is an arithmetic number, because the mean of its divisors is an integer number (1758375).

Almost surely, 2^7017421 is an apocalyptic number.

It is an amenable number.

7017421 is a deficient number, since it is larger than the sum of its proper divisors (16079).

7017421 is a wasteful number, since it uses less digits than its factorization.

7017421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16078.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 7017421 is about 2649.0415247783. The cubic root of 7017421 is about 191.4516781186.

The spelling of 7017421 in words is "seven million, seventeen thousand, four hundred twenty-one".