6825981 has 4 divisors (see below), whose sum is σ = 9101312. Its totient is φ = 4550652.

The previous prime is 6825979. The next prime is 6825989. The reversal of 6825981 is 1895286.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6825981 - 2¹ = 6825979 is a prime.

It is a super-2 number, since 2×6825981² = 93188033224722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6825989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1137661 + ... + 1137666.

It is an arithmetic number, because the mean of its divisors is an integer number (2275328).

Almost surely, 2^6825981 is an apocalyptic number.

It is an amenable number.

6825981 is a deficient number, since it is larger than the sum of its proper divisors (2275331).

6825981 is a wasteful number, since it uses less digits than its factorization.

6825981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275330.

The product of its digits is 34560, while the sum is 39.

The square root of 6825981 is about 2612.6578421217. The cubic root of 6825981 is about 189.6946248727.

The spelling of 6825981 in words is "six million, eight hundred twenty-five thousand, nine hundred eighty-one".