4201636 has 18 divisors (see below), whose sum is σ = 7621250. Its totient is φ = 2026752.

The previous prime is 4201633. The next prime is 4201649. The reversal of 4201636 is 6361024.

It can be written as a sum of positive squares in 3 ways, for example, as 553536 + 3648100 = 744^2 + 1910^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4201633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2740 + ... + 3988.

Almost surely, 2^4201636 is an apocalyptic number.

It is an amenable number.

4201636 is a deficient number, since it is larger than the sum of its proper divisors (3419614).

4201636 is a wasteful number, since it uses less digits than its factorization.

4201636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311 (or 1280 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 4201636 is about 2049.7892574604. The cubic root of 4201636 is about 161.3638108454.

Adding to 4201636 its product of nonzero digits (864), we get a square (4202500 = 2050²).

The spelling of 4201636 in words is "four million, two hundred one thousand, six hundred thirty-six".