6921901 has 8 divisors (see below), whose sum is σ = 8011520. Its totient is φ = 5857488.

The previous prime is 6921883. The next prime is 6921917. The reversal of 6921901 is 1091296.

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

It is not a de Polignac number, because 6921901 - 2⁵ = 6921869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6921901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6921961) 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, 5706 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (1001440).

Almost surely, 2^6921901 is an apocalyptic number.

It is an amenable number.

6921901 is a deficient number, since it is larger than the sum of its proper divisors (1089619).

6921901 is a wasteful number, since it uses less digits than its factorization.

6921901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12603.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 6921901 is about 2630.9505886656. The cubic root of 6921901 is about 190.5790368804.

The spelling of 6921901 in words is "six million, nine hundred twenty-one thousand, nine hundred one".