421963 has 4 divisors (see below), whose sum is σ = 424008. Its totient is φ = 419920.

The previous prime is 421943. The next prime is 421973. The reversal of 421963 is 369124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421963 is a prime.

It is a Duffinian number.

421963 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (421913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 673 + ... + 1138.

It is an arithmetic number, because the mean of its divisors is an integer number (106002).

2⁴²¹⁹⁶³ is an apocalyptic number.

421963 is a deficient number, since it is larger than the sum of its proper divisors (2045).

421963 is a wasteful number, since it uses less digits than its factorization.

421963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044.

The product of its digits is 1296, while the sum is 25.

The square root of 421963 is about 649.5867917376. The cubic root of 421963 is about 75.0052144523.

The spelling of 421963 in words is "four hundred twenty-one thousand, nine hundred sixty-three".