6994021 has 8 divisors (see below), whose sum is σ = 7449624. Its totient is φ = 6543360.

The previous prime is 6994019. The next prime is 6994027. The reversal of 6994021 is 1204996.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1185921 + 5808100 = 1089^2 + 2410^2 .

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 6994021 - 2¹ = 6994019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6994027) 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, 1941 + ... + 4213.

It is an arithmetic number, because the mean of its divisors is an integer number (931203).

Almost surely, 2^6994021 is an apocalyptic number.

It is an amenable number.

6994021 is a deficient number, since it is larger than the sum of its proper divisors (455603).

6994021 is a wasteful number, since it uses less digits than its factorization.

6994021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 6994021 is about 2644.6211448901. The cubic root of 6994021 is about 191.2386388797.

The spelling of 6994021 in words is "six million, nine hundred ninety-four thousand, twenty-one".