196421 has 4 divisors (see below), whose sum is σ = 198432. Its totient is φ = 194412.

The previous prime is 196387. The next prime is 196429. The reversal of 196421 is 124691.

It is a happy number.

196421 is nontrivially palindromic in base 7.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196429) 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, 851 + ... + 1056.

It is an arithmetic number, because the mean of its divisors is an integer number (49608).

2¹⁹⁶⁴²¹ is an apocalyptic number.

It is an amenable number.

196421 is a deficient number, since it is larger than the sum of its proper divisors (2011).

196421 is a wasteful number, since it uses less digits than its factorization.

196421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010.

The product of its digits is 432, while the sum is 23.

The square root of 196421 is about 443.1940884082. The cubic root of 196421 is about 58.1294177087.

The spelling of 196421 in words is "one hundred ninety-six thousand, four hundred twenty-one".