2075981 has 2 divisors, whose sum is σ = 2075982. Its totient is φ = 2075980.

The previous prime is 2075963. The next prime is 2075987. The reversal of 2075981 is 1895702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1755625 + 320356 = 1325^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 2075981 - 2⁶ = 2075917 is a prime.

It is a super-2 number, since 2×2075981² = 8619394224722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2075987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1037990 + 1037991.

It is an arithmetic number, because the mean of its divisors is an integer number (1037991).

2^2075981 is an apocalyptic number.

It is an amenable number.

2075981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2075981 is an equidigital number, since it uses as much as digits as its factorization.

2075981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 2075981 is about 1440.8264989234. The cubic root of 2075981 is about 127.5678173113.

The spelling of 2075981 in words is "two million, seventy-five thousand, nine hundred eighty-one".