6901421 has 4 divisors (see below), whose sum is σ = 6910332. Its totient is φ = 6892512.

The previous prime is 6901417. The next prime is 6901429. The reversal of 6901421 is 1241096.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5929225 + 972196 = 2435^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 6901421 - 2² = 6901417 is a prime.

It is a super-2 number, since 2×6901421² = 95259223638482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6901429) 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 3 ways as a sum of consecutive naturals, for example, 3170 + ... + 4883.

It is an arithmetic number, because the mean of its divisors is an integer number (1727583).

Almost surely, 2^6901421 is an apocalyptic number.

It is an amenable number.

6901421 is a deficient number, since it is larger than the sum of its proper divisors (8911).

6901421 is an equidigital number, since it uses as much as digits as its factorization.

6901421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8910.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 6901421 is about 2627.0555761156. The cubic root of 6901421 is about 190.3908942312.

The spelling of 6901421 in words is "six million, nine hundred one thousand, four hundred twenty-one".