6925421 has 2 divisors, whose sum is σ = 6925422. Its totient is φ = 6925420.

The previous prime is 6925393. The next prime is 6925423. The reversal of 6925421 is 1245296.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3724900 + 3200521 = 1930^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 6925421 - 2¹⁴ = 6909037 is a prime.

It is a super-2 number, since 2×6925421² = 95922912054482, which contains 22 as substring.

Together with 6925423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6925423) 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 as a sum of consecutive naturals, namely, 3462710 + 3462711.

It is an arithmetic number, because the mean of its divisors is an integer number (3462711).

Almost surely, 2^6925421 is an apocalyptic number.

It is an amenable number.

6925421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6925421 is an equidigital number, since it uses as much as digits as its factorization.

6925421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 6925421 is about 2631.6194633723. The cubic root of 6925421 is about 190.6113365106.

The spelling of 6925421 in words is "six million, nine hundred twenty-five thousand, four hundred twenty-one".