6901221 has 8 divisors (see below), whose sum is σ = 9238464. Its totient is φ = 4582400.

The previous prime is 6901207. The next prime is 6901241. The reversal of 6901221 is 1221096.

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

It is a cyclic number.

It is not a de Polignac number, because 6901221 - 2¹⁸ = 6639077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6901241) 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 in 7 ways as a sum of consecutive naturals, for example, 3705 + ... + 5246.

It is an arithmetic number, because the mean of its divisors is an integer number (1154808).

Almost surely, 2^6901221 is an apocalyptic number.

It is an amenable number.

6901221 is a deficient number, since it is larger than the sum of its proper divisors (2337243).

6901221 is a wasteful number, since it uses less digits than its factorization.

6901221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9211.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 6901221 is about 2627.0175104099. The cubic root of 6901221 is about 190.3890550667.

The spelling of 6901221 in words is "six million, nine hundred one thousand, two hundred twenty-one".