421943 has 2 divisors, whose sum is σ = 421944. Its totient is φ = 421942.

The previous prime is 421913. The next prime is 421973. The reversal of 421943 is 349124.

It is a balanced prime because it is at equal distance from previous prime (421913) and next prime (421973).

It is a cyclic number.

It is not a de Polignac number, because 421943 - 2¹⁰ = 420919 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 (421913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210971 + 210972.

It is an arithmetic number, because the mean of its divisors is an integer number (210972).

2⁴²¹⁹⁴³ is an apocalyptic number.

421943 is a deficient number, since it is larger than the sum of its proper divisors (1).

421943 is an equidigital number, since it uses as much as digits as its factorization.

421943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 421943 is about 649.5713971535. The cubic root of 421943 is about 75.0040294131.

The spelling of 421943 in words is "four hundred twenty-one thousand, nine hundred forty-three".