6981945 has 8 divisors (see below), whose sum is σ = 11171136. Its totient is φ = 3723696.

The previous prime is 6981943. The next prime is 6981959. The reversal of 6981945 is 5491896.

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

It is not a de Polignac number, because 6981945 - 2¹ = 6981943 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6981897 and 6981906.

It is not an unprimeable number, because it can be changed into a prime (6981943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232717 + ... + 232746.

It is an arithmetic number, because the mean of its divisors is an integer number (1396392).

Almost surely, 2^6981945 is an apocalyptic number.

It is an amenable number.

6981945 is a deficient number, since it is larger than the sum of its proper divisors (4189191).

6981945 is a wasteful number, since it uses less digits than its factorization.

6981945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465471.

The product of its digits is 77760, while the sum is 42.

The square root of 6981945 is about 2642.3370337639. The cubic root of 6981945 is about 191.1285101365.

The spelling of 6981945 in words is "six million, nine hundred eighty-one thousand, nine hundred forty-five".