3661545 has 32 divisors (see below), whose sum is σ = 6314112. Its totient is φ = 1805312.

The previous prime is 3661543. The next prime is 3661561. The reversal of 3661545 is 5451663.

It is a cyclic number.

It is not a de Polignac number, because 3661545 - 2¹ = 3661543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3661543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21079 + ... + 21251.

It is an arithmetic number, because the mean of its divisors is an integer number (197316).

Almost surely, 2^3661545 is an apocalyptic number.

It is an amenable number.

3661545 is a deficient number, since it is larger than the sum of its proper divisors (2652567).

3661545 is a wasteful number, since it uses less digits than its factorization.

3661545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281.

The product of its digits is 10800, while the sum is 30.

The square root of 3661545 is about 1913.5163965851. The cubic root of 3661545 is about 154.1303360540.

The spelling of 3661545 in words is "three million, six hundred sixty-one thousand, five hundred forty-five".