3784545 has 24 divisors (see below), whose sum is σ = 6740136. Its totient is φ = 1963008.

The previous prime is 3784541. The next prime is 3784577. The reversal of 3784545 is 5454873.

3784545 is a `hidden beast` number, since 37 + 84 + 545 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1846881 + 1937664 = 1359^2 + 1392^2 .

It is not a de Polignac number, because 3784545 - 2² = 3784541 is a prime.

It is a Curzon number.

3784545 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3784541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 529 + ... + 2801.

It is an arithmetic number, because the mean of its divisors is an integer number (280839).

Almost surely, 2^3784545 is an apocalyptic number.

It is an amenable number.

3784545 is a deficient number, since it is larger than the sum of its proper divisors (2955591).

3784545 is a wasteful number, since it uses less digits than its factorization.

3784545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321 (or 2318 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 3784545 is about 1945.3907062593. The cubic root of 3784545 is about 155.8372316093.

It can be divided in two parts, 37845 and 45, that multiplied together give a square (1703025 = 1305²).

The spelling of 3784545 in words is "three million, seven hundred eighty-four thousand, five hundred forty-five".