7022421 has 12 divisors (see below), whose sum is σ = 11592672. Its totient is φ = 4012776.

The previous prime is 7022417. The next prime is 7022441. The reversal of 7022421 is 1242207.

It is not a de Polignac number, because 7022421 - 2² = 7022417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7022394 and 7022403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7022441) 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 11 ways as a sum of consecutive naturals, for example, 55671 + ... + 55796.

It is an arithmetic number, because the mean of its divisors is an integer number (966056).

Almost surely, 2^7022421 is an apocalyptic number.

It is an amenable number.

7022421 is a deficient number, since it is larger than the sum of its proper divisors (4570251).

7022421 is a wasteful number, since it uses less digits than its factorization.

7022421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111480 (or 111477 counting only the distinct ones).

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

The square root of 7022421 is about 2649.9850942977. The cubic root of 7022421 is about 191.4971378930.

Adding to 7022421 its reverse (1242207), we get a palindrome (8264628).

The spelling of 7022421 in words is "seven million, twenty-two thousand, four hundred twenty-one".