4159621 has 2 divisors, whose sum is σ = 4159622. Its totient is φ = 4159620.

The previous prime is 4159601. The next prime is 4159627. The reversal of 4159621 is 1269514.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2927521 + 1232100 = 1711^2 + 1110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4159621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4159621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4159627) 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, 2079810 + 2079811.

It is an arithmetic number, because the mean of its divisors is an integer number (2079811).

Almost surely, 2^4159621 is an apocalyptic number.

It is an amenable number.

4159621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4159621 is an equidigital number, since it uses as much as digits as its factorization.

4159621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 4159621 is about 2039.5148933018. The cubic root of 4159621 is about 160.8241460444.

The spelling of 4159621 in words is "four million, one hundred fifty-nine thousand, six hundred twenty-one".