621043 has 2 divisors, whose sum is σ = 621044. Its totient is φ = 621042.

The previous prime is 621031. The next prime is 621059. The reversal of 621043 is 340126.

It is an a-pointer prime, because the next prime (621059) can be obtained adding 621043 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621043 - 2⁹ = 620531 is a prime.

It is not a weakly prime, because it can be changed into another prime (621013) 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, 310521 + 310522.

It is an arithmetic number, because the mean of its divisors is an integer number (310522).

2⁶²¹⁰⁴³ is an apocalyptic number.

621043 is a deficient number, since it is larger than the sum of its proper divisors (1).

621043 is an equidigital number, since it uses as much as digits as its factorization.

621043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 621043 is about 788.0628147553. The cubic root of 621043 is about 85.3179785334.

Adding to 621043 its reverse (340126), we get a palindrome (961169).

The spelling of 621043 in words is "six hundred twenty-one thousand, forty-three".