3621559 has 2 divisors, whose sum is σ = 3621560. Its totient is φ = 3621558.

The previous prime is 3621529. The next prime is 3621577. The reversal of 3621559 is 9551263.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3621559 - 2¹⁵ = 3588791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3621559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3621529) by changing a digit.

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 as a sum of consecutive naturals, namely, 1810779 + 1810780.

It is an arithmetic number, because the mean of its divisors is an integer number (1810780).

Almost surely, 2^3621559 is an apocalyptic number.

3621559 is a deficient number, since it is larger than the sum of its proper divisors (1).

3621559 is an equidigital number, since it uses as much as digits as its factorization.

3621559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 31.

The square root of 3621559 is about 1903.0394110475. The cubic root of 3621559 is about 153.5672197255.

The spelling of 3621559 in words is "three million, six hundred twenty-one thousand, five hundred fifty-nine".