4075981 has 16 divisors (see below), whose sum is σ = 5128704. Its totient is φ = 3153024.

The previous prime is 4075963. The next prime is 4075987. The reversal of 4075981 is 1895704.

It is a happy number.

It is not a de Polignac number, because 4075981 - 2⁹ = 4075469 is a prime.

It is a super-2 number, since 2×4075981² = 33227242224722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4075987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3801 + ... + 4753.

It is an arithmetic number, because the mean of its divisors is an integer number (320544).

Almost surely, 2^4075981 is an apocalyptic number.

It is an amenable number.

4075981 is a deficient number, since it is larger than the sum of its proper divisors (1052723).

4075981 is a wasteful number, since it uses less digits than its factorization.

4075981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 4075981 is about 2018.9058918137. The cubic root of 4075981 is about 159.7389101197.

The spelling of 4075981 in words is "four million, seventy-five thousand, nine hundred eighty-one".