2075681 has 4 divisors (see below), whose sum is σ = 2165952. Its totient is φ = 1985412.

The previous prime is 2075677. The next prime is 2075699. The reversal of 2075681 is 1865702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2075681 - 2² = 2075677 is a prime.

It is a super-2 number, since 2×2075681² = 8616903227522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2075611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45101 + ... + 45146.

It is an arithmetic number, because the mean of its divisors is an integer number (541488).

2^2075681 is an apocalyptic number.

It is an amenable number.

2075681 is a deficient number, since it is larger than the sum of its proper divisors (90271).

2075681 is an equidigital number, since it uses as much as digits as its factorization.

2075681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90270.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 2075681 is about 1440.7223882483. The cubic root of 2075681 is about 127.5616720738.

The spelling of 2075681 in words is "two million, seventy-five thousand, six hundred eighty-one".