421992 has 24 divisors (see below), whose sum is σ = 1143090. Its totient is φ = 140640.

The previous prime is 421987. The next prime is 421997. The reversal of 421992 is 299124.

421992 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (421987) and next prime (421997).

It can be written as a sum of positive squares in only one way, i.e., 367236 + 54756 = 606^2 + 234^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (421997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2859 + ... + 3002.

2⁴²¹⁹⁹² is an apocalyptic number.

It is an amenable number.

421992 is an abundant number, since it is smaller than the sum of its proper divisors (721098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421992 is a wasteful number, since it uses less digits than its factorization.

421992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5873 (or 5866 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 421992 is about 649.6091132366. The cubic root of 421992 is about 75.0069326925.

The spelling of 421992 in words is "four hundred twenty-one thousand, nine hundred ninety-two".