3903581 has 6 divisors (see below), whose sum is σ = 4290846. Its totient is φ = 3548600.

The previous prime is 3903577. The next prime is 3903589. The reversal of 3903581 is 1853093.

It can be written as a sum of positive squares in only one way, i.e., 2544025 + 1359556 = 1595^2 + 1166^2 .

It is not a de Polignac number, because 3903581 - 2² = 3903577 is a prime.

It is a super-3 number, since 3×3903581³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3903589) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16010 + ... + 16251.

It is an arithmetic number, because the mean of its divisors is an integer number (715141).

Almost surely, 2^3903581 is an apocalyptic number.

It is an amenable number.

3903581 is a deficient number, since it is larger than the sum of its proper divisors (387265).

3903581 is a wasteful number, since it uses less digits than its factorization.

3903581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32283 (or 32272 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 3903581 is about 1975.7482127032. The cubic root of 3903581 is about 157.4542539521.

The spelling of 3903581 in words is "three million, nine hundred three thousand, five hundred eighty-one".