3985081 has 4 divisors (see below), whose sum is σ = 4113664. Its totient is φ = 3856500.

The previous prime is 3985073. The next prime is 3985087. The reversal of 3985081 is 1805893.

3985081 is nontrivially palindromic in base 9.

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 3985081 - 2³ = 3985073 is a prime.

It is a super-2 number, since 2×3985081² = 31761741153122, which contains 22 as substring.

It is a Duffinian number.

3985081 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3985087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64245 + ... + 64306.

It is an arithmetic number, because the mean of its divisors is an integer number (1028416).

Almost surely, 2^3985081 is an apocalyptic number.

3985081 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3985081 is a deficient number, since it is larger than the sum of its proper divisors (128583).

3985081 is a wasteful number, since it uses less digits than its factorization.

3985081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128582.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 3985081 is about 1996.2667657405. The cubic root of 3985081 is about 158.5425056915.

The spelling of 3985081 in words is "three million, nine hundred eighty-five thousand, eighty-one".