7000421 has 4 divisors (see below), whose sum is σ = 7115244. Its totient is φ = 6885600.

The previous prime is 7000391. The next prime is 7000429. The reversal of 7000421 is 1240007.

It is a happy number.

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 83521 + 6916900 = 289^2 + 2630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7000421 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7000396 and 7000405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7000429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57320 + ... + 57441.

It is an arithmetic number, because the mean of its divisors is an integer number (1778811).

Almost surely, 2^7000421 is an apocalyptic number.

It is an amenable number.

7000421 is a deficient number, since it is larger than the sum of its proper divisors (114823).

7000421 is a wasteful number, since it uses less digits than its factorization.

7000421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114822.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 7000421 is about 2645.8308713899. The cubic root of 7000421 is about 191.2969531719.

Adding to 7000421 its reverse (1240007), we get a palindrome (8240428).

The spelling of 7000421 in words is "seven million, four hundred twenty-one", and thus it is an aban number.