3665420 has 24 divisors (see below), whose sum is σ = 8397648. Its totient is φ = 1332800.

The previous prime is 3665419. The next prime is 3665437. The reversal of 3665420 is 245663.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3665420.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8111 + ... + 8550.

It is an arithmetic number, because the mean of its divisors is an integer number (349902).

Almost surely, 2^3665420 is an apocalyptic number.

It is an amenable number.

3665420 is an abundant number, since it is smaller than the sum of its proper divisors (4732228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3665420 is a wasteful number, since it uses less digits than its factorization.

3665420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16681 (or 16679 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 3665420 is about 1914.5286626217. The cubic root of 3665420 is about 154.1846887462.

It can be divided in two parts, 36 and 65420, that added together give a palindrome (65456).

The spelling of 3665420 in words is "three million, six hundred sixty-five thousand, four hundred twenty".