7051421 has 8 divisors (see below), whose sum is σ = 7655424. Its totient is φ = 6456240.

The previous prime is 7051411. The next prime is 7051427. The reversal of 7051421 is 1241507.

7051421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7051421 - 2¹⁴ = 7035037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7051393 and 7051402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7051427) 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 7 ways as a sum of consecutive naturals, for example, 485 + ... + 3786.

It is an arithmetic number, because the mean of its divisors is an integer number (956928).

Almost surely, 2^7051421 is an apocalyptic number.

It is an amenable number.

7051421 is a deficient number, since it is larger than the sum of its proper divisors (604003).

7051421 is a wasteful number, since it uses less digits than its factorization.

7051421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4411.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 7051421 is about 2655.4511857686. The cubic root of 7051421 is about 191.7603799654.

Adding to 7051421 its reverse (1241507), we get a palindrome (8292928).

The spelling of 7051421 in words is "seven million, fifty-one thousand, four hundred twenty-one".