3636541 has 2 divisors, whose sum is σ = 3636542. Its totient is φ = 3636540.

The previous prime is 3636539. The next prime is 3636547. The reversal of 3636541 is 1456363.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3080025 + 556516 = 1755^2 + 746^2 .

It is a cyclic number.

It is not a de Polignac number, because 3636541 - 2¹ = 3636539 is a prime.

Together with 3636539, it forms a pair of twin primes.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3636547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1818270 + 1818271.

It is an arithmetic number, because the mean of its divisors is an integer number (1818271).

Almost surely, 2^3636541 is an apocalyptic number.

It is an amenable number.

3636541 is a deficient number, since it is larger than the sum of its proper divisors (1).

3636541 is an equidigital number, since it uses as much as digits as its factorization.

3636541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 28.

The square root of 3636541 is about 1906.9716830619. The cubic root of 3636541 is about 153.7786920697.

The spelling of 3636541 in words is "three million, six hundred thirty-six thousand, five hundred forty-one".