3661975 has 12 divisors (see below), whose sum is σ = 4698360. Its totient is φ = 2828000.

The previous prime is 3661963. The next prime is 3661979. The reversal of 3661975 is 5791663.

It is not a de Polignac number, because 3661975 - 2⁵ = 3661943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1801 + ... + 3250.

It is an arithmetic number, because the mean of its divisors is an integer number (391530).

Almost surely, 2^3661975 is an apocalyptic number.

3661975 is a deficient number, since it is larger than the sum of its proper divisors (1036385).

3661975 is a wasteful number, since it uses less digits than its factorization.

3661975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5090 (or 5085 counting only the distinct ones).

The product of its digits is 34020, while the sum is 37.

The square root of 3661975 is about 1913.6287518743. The cubic root of 3661975 is about 154.1363693405.

The spelling of 3661975 in words is "three million, six hundred sixty-one thousand, nine hundred seventy-five".