3540581 has 12 divisors (see below), whose sum is σ = 4029900. Its totient is φ = 3104640.

The previous prime is 3540553. The next prime is 3540583. The reversal of 3540581 is 1850453.

It can be written as a sum of positive squares in 2 ways, for example, as 1464100 + 2076481 = 1210^2 + 1441^2 .

It is not a de Polignac number, because 3540581 - 2¹⁴ = 3524197 is a prime.

It is a super-2 number, since 2×3540581² = 25071427635122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3540581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3540583) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3005 + ... + 4013.

It is an arithmetic number, because the mean of its divisors is an integer number (335825).

Almost surely, 2^3540581 is an apocalyptic number.

It is an amenable number.

3540581 is a deficient number, since it is larger than the sum of its proper divisors (489319).

3540581 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (3540580) it forms an eRAP, since the sums of their prime factors are consecutive (1059 and 1060).

3540581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060 (or 1049 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 3540581 is about 1881.6431648960. The cubic root of 3540581 is about 152.4139943244.

The spelling of 3540581 in words is "three million, five hundred forty thousand, five hundred eighty-one".