3081945 has 8 divisors (see below), whose sum is σ = 4931136. Its totient is φ = 1643696.

The previous prime is 3081943. The next prime is 3081959. The reversal of 3081945 is 5491803.

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 3081945 - 2¹ = 3081943 is a prime.

It is a Curzon number.

3081945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3081943) 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, 102717 + ... + 102746.

It is an arithmetic number, because the mean of its divisors is an integer number (616392).

Almost surely, 2^3081945 is an apocalyptic number.

It is an amenable number.

3081945 is a deficient number, since it is larger than the sum of its proper divisors (1849191).

3081945 is a wasteful number, since it uses less digits than its factorization.

3081945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205471.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 3081945 is about 1755.5469233262. The cubic root of 3081945 is about 145.5263470669.

The spelling of 3081945 in words is "three million, eighty-one thousand, nine hundred forty-five".