4343621 has 2 divisors, whose sum is σ = 4343622. Its totient is φ = 4343620.

The previous prime is 4343617. The next prime is 4343629. The reversal of 4343621 is 1263434.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2927521 + 1416100 = 1711^2 + 1190^2 .

It is a cyclic number.

It is not a de Polignac number, because 4343621 - 2² = 4343617 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4343629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2171810 + 2171811.

It is an arithmetic number, because the mean of its divisors is an integer number (2171811).

Almost surely, 2^4343621 is an apocalyptic number.

It is an amenable number.

4343621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4343621 is an equidigital number, since it uses as much as digits as its factorization.

4343621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 23.

The square root of 4343621 is about 2084.1355522134. The cubic root of 4343621 is about 163.1613567716.

It can be divided in two parts, 4343 and 621, that multiplied together give a triangular number (2697003 = T₂₃₂₂).

The spelling of 4343621 in words is "four million, three hundred forty-three thousand, six hundred twenty-one".