3145981 has 2 divisors, whose sum is σ = 3145982. Its totient is φ = 3145980.

The previous prime is 3145943. The next prime is 3145997. The reversal of 3145981 is 1895413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3118756 + 27225 = 1766^2 + 165^2 .

It is a cyclic number.

It is not a de Polignac number, because 3145981 - 2¹⁵ = 3113213 is a prime.

It is a super-3 number, since 3×3145981³ = 93409175977185333423, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3145781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1572990 + 1572991.

It is an arithmetic number, because the mean of its divisors is an integer number (1572991).

Almost surely, 2^3145981 is an apocalyptic number.

It is an amenable number.

3145981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3145981 is an equidigital number, since it uses as much as digits as its factorization.

3145981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 31.

The square root of 3145981 is about 1773.6913485722. The cubic root of 3145981 is about 146.5273510652.

The spelling of 3145981 in words is "three million, one hundred forty-five thousand, nine hundred eighty-one".