3885561 has 6 divisors (see below), whose sum is σ = 5612490. Its totient is φ = 2590368.

The previous prime is 3885533. The next prime is 3885569. The reversal of 3885561 is 1655883.

It can be written as a sum of positive squares in only one way, i.e., 3861225 + 24336 = 1965^2 + 156^2 .

It is not a de Polignac number, because 3885561 - 2⁷ = 3885433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3885569) 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, 215856 + ... + 215873.

It is an arithmetic number, because the mean of its divisors is an integer number (935415).

Almost surely, 2^3885561 is an apocalyptic number.

It is an amenable number.

3885561 is a deficient number, since it is larger than the sum of its proper divisors (1726929).

3885561 is a wasteful number, since it uses less digits than its factorization.

3885561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431735 (or 431732 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 3885561 is about 1971.1826399398. The cubic root of 3885561 is about 157.2115961766.

The spelling of 3885561 in words is "three million, eight hundred eighty-five thousand, five hundred sixty-one".