3540641 has 16 divisors (see below), whose sum is σ = 4155984. Its totient is φ = 2985984.

The previous prime is 3540619. The next prime is 3540661. The reversal of 3540641 is 1460453.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 6241 + 3534400 = 79^2 + 1880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3540641 is a prime.

It is a super-2 number, since 2×3540641² = 25072277381762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3540611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7961 + ... + 8393.

It is an arithmetic number, because the mean of its divisors is an integer number (259749).

Almost surely, 2^3540641 is an apocalyptic number.

It is an amenable number.

3540641 is a deficient number, since it is larger than the sum of its proper divisors (615343).

3540641 is a wasteful number, since it uses less digits than its factorization.

3540641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 3540641 is about 1881.6591083403. The cubic root of 3540641 is about 152.4148552742.

The spelling of 3540641 in words is "three million, five hundred forty thousand, six hundred forty-one".