2981945 has 8 divisors (see below), whose sum is σ = 3619080. Its totient is φ = 2358400.

The previous prime is 2981933. The next prime is 2981947. The reversal of 2981945 is 5491892.

It can be written as a sum of positive squares in 4 ways, for example, as 33856 + 2948089 = 184^2 + 1717^2 .

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

It is not a de Polignac number, because 2981945 - 2¹⁰ = 2980921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2981899 and 2981908.

It is not an unprimeable number, because it can be changed into a prime (2981947) 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, 2906 + ... + 3795.

It is an arithmetic number, because the mean of its divisors is an integer number (452385).

2^2981945 is an apocalyptic number.

It is an amenable number.

2981945 is a deficient number, since it is larger than the sum of its proper divisors (637135).

2981945 is an equidigital number, since it uses as much as digits as its factorization.

2981945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6795.

The product of its digits is 25920, while the sum is 38.

The square root of 2981945 is about 1726.8309123941. The cubic root of 2981945 is about 143.9350433627.

The spelling of 2981945 in words is "two million, nine hundred eighty-one thousand, nine hundred forty-five".