3111745 has 24 divisors (see below), whose sum is σ = 4682664. Its totient is φ = 1967616.

The previous prime is 3111743. The next prime is 3111769. The reversal of 3111745 is 5471113.

It can be written as a sum of positive squares in 4 ways, for example, as 451584 + 2660161 = 672^2 + 1631^2 .

It is not a de Polignac number, because 3111745 - 2¹ = 3111743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3111743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2697 + ... + 3673.

It is an arithmetic number, because the mean of its divisors is an integer number (195111).

Almost surely, 2^3111745 is an apocalyptic number.

3111745 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3111745 is a deficient number, since it is larger than the sum of its proper divisors (1570919).

3111745 is a wasteful number, since it uses less digits than its factorization.

3111745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009 (or 1002 counting only the distinct ones).

The product of its digits is 420, while the sum is 22.

The square root of 3111745 is about 1764.0138888342. The cubic root of 3111745 is about 145.9938854010.

Adding to 3111745 its reverse (5471113), we get a palindrome (8582858).

The spelling of 3111745 in words is "three million, one hundred eleven thousand, seven hundred forty-five".