4340621 has 2 divisors, whose sum is σ = 4340622. Its totient is φ = 4340620.

The previous prime is 4340599. The next prime is 4340639. The reversal of 4340621 is 1260434.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3279721 + 1060900 = 1811^2 + 1030^2 .

It is a cyclic number.

It is not a de Polignac number, because 4340621 - 2²² = 146317 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4340593 and 4340602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4340641) 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 as a sum of consecutive naturals, namely, 2170310 + 2170311.

It is an arithmetic number, because the mean of its divisors is an integer number (2170311).

Almost surely, 2^4340621 is an apocalyptic number.

It is an amenable number.

4340621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4340621 is an equidigital number, since it uses as much as digits as its factorization.

4340621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 4340621 is about 2083.4157050382. The cubic root of 4340621 is about 163.1237846780.

The spelling of 4340621 in words is "four million, three hundred forty thousand, six hundred twenty-one".