3180861 has 6 divisors (see below), whose sum is σ = 4594590. Its totient is φ = 2120568.

The previous prime is 3180841. The next prime is 3180869. The reversal of 3180861 is 1680813.

It can be written as a sum of positive squares in only one way, i.e., 3132900 + 47961 = 1770^2 + 219^2 .

It is not a de Polignac number, because 3180861 - 2⁶ = 3180797 is a prime.

3180861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3180869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 176706 + ... + 176723.

It is an arithmetic number, because the mean of its divisors is an integer number (765765).

Almost surely, 2^3180861 is an apocalyptic number.

It is an amenable number.

3180861 is a deficient number, since it is larger than the sum of its proper divisors (1413729).

3180861 is a wasteful number, since it uses less digits than its factorization.

3180861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353435 (or 353432 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 3180861 is about 1783.4968460864. The cubic root of 3180861 is about 147.0668861242.

The spelling of 3180861 in words is "three million, one hundred eighty thousand, eight hundred sixty-one".