3696021 has 54 divisors (see below), whose sum is σ = 6824610. Its totient is φ = 1919232.

The previous prime is 3696019. The next prime is 3696053. The reversal of 3696021 is 1206963.

It is a happy number.

3696021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1535121 + 2160900 = 1239^2 + 1470^2 .

It is not a de Polignac number, because 3696021 - 2¹ = 3696019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3696001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 127435 + ... + 127463.

Almost surely, 2^3696021 is an apocalyptic number.

It is an amenable number.

3696021 is a deficient number, since it is larger than the sum of its proper divisors (3128589).

3696021 is a wasteful number, since it uses less digits than its factorization.

3696021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 3696021 is about 1922.5038361470. The cubic root of 3696021 is about 154.6125738761.

The spelling of 3696021 in words is "three million, six hundred ninety-six thousand, twenty-one".