3181825 has 12 divisors (see below), whose sum is σ = 3978540. Its totient is φ = 2524160.

The previous prime is 3181823. The next prime is 3181831. The reversal of 3181825 is 5281813.

It can be written as a sum of positive squares in 6 ways, for example, as 531441 + 2650384 = 729^2 + 1628^2 .

It is not a de Polignac number, because 3181825 - 2¹ = 3181823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3181793 and 3181802.

It is not an unprimeable number, because it can be changed into a prime (3181823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2961 + ... + 3889.

It is an arithmetic number, because the mean of its divisors is an integer number (331545).

Almost surely, 2^3181825 is an apocalyptic number.

It is an amenable number.

3181825 is a deficient number, since it is larger than the sum of its proper divisors (796715).

3181825 is a wasteful number, since it uses less digits than its factorization.

3181825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076 (or 1071 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The square root of 3181825 is about 1783.7670812076. The cubic root of 3181825 is about 147.0817414479.

The spelling of 3181825 in words is "three million, one hundred eighty-one thousand, eight hundred twenty-five".