6958421 has 4 divisors (see below), whose sum is σ = 6963744. Its totient is φ = 6953100.

The previous prime is 6958411. The next prime is 6958429. The reversal of 6958421 is 1248596.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6958421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6958429) 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, 806 + ... + 3816.

It is an arithmetic number, because the mean of its divisors is an integer number (1740936).

Almost surely, 2^6958421 is an apocalyptic number.

It is an amenable number.

6958421 is a deficient number, since it is larger than the sum of its proper divisors (5323).

6958421 is a wasteful number, since it uses less digits than its factorization.

6958421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5322.

The product of its digits is 17280, while the sum is 35.

The square root of 6958421 is about 2637.8819154769. The cubic root of 6958421 is about 190.9136146183.

The spelling of 6958421 in words is "six million, nine hundred fifty-eight thousand, four hundred twenty-one".