6920421 has 8 divisors (see below), whose sum is σ = 9423744. Its totient is φ = 4515360.

The previous prime is 6920399. The next prime is 6920423. The reversal of 6920421 is 1240296.

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

It is not a de Polignac number, because 6920421 - 2⁷ = 6920293 is a prime.

It is a super-3 number, since 3×6920421³ (a number of 21 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6920391 and 6920400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6920423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24400 + ... + 24681.

It is an arithmetic number, because the mean of its divisors is an integer number (1177968).

Almost surely, 2^6920421 is an apocalyptic number.

It is an amenable number.

6920421 is a deficient number, since it is larger than the sum of its proper divisors (2503323).

6920421 is a wasteful number, since it uses less digits than its factorization.

6920421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49131.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 6920421 is about 2630.6693064694. The cubic root of 6920421 is about 190.5654530841.

The spelling of 6920421 in words is "six million, nine hundred twenty thousand, four hundred twenty-one".