609421 has 2 divisors, whose sum is σ = 609422. Its totient is φ = 609420.

The previous prime is 609407. The next prime is 609437. The reversal of 609421 is 124906.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 212521 = 630^2 + 461^2 .

It is a cyclic number.

It is not a de Polignac number, because 609421 - 2¹⁹ = 85133 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 609392 and 609401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (609461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304710 + 304711.

It is an arithmetic number, because the mean of its divisors is an integer number (304711).

2⁶⁰⁹⁴²¹ is an apocalyptic number.

It is an amenable number.

609421 is a deficient number, since it is larger than the sum of its proper divisors (1).

609421 is an equidigital number, since it uses as much as digits as its factorization.

609421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 609421 is about 780.6542128241. The cubic root of 609421 is about 84.7824192966.

The spelling of 609421 in words is "six hundred nine thousand, four hundred twenty-one".