431842 has 4 divisors (see below), whose sum is σ = 647766. Its totient is φ = 215920.

The previous prime is 431833. The next prime is 431857. The reversal of 431842 is 248134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248134 = 2 ⋅124067.

It can be written as a sum of positive squares in only one way, i.e., 239121 + 192721 = 489^2 + 439^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107959 + ... + 107962.

2⁴³¹⁸⁴² is an apocalyptic number.

431842 is a deficient number, since it is larger than the sum of its proper divisors (215924).

431842 is a wasteful number, since it uses less digits than its factorization.

431842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215923.

The product of its digits is 768, while the sum is 22.

The square root of 431842 is about 657.1468633418. The cubic root of 431842 is about 75.5860457807.

Adding to 431842 its reverse (248134), we get a palindrome (679976).

It can be divided in two parts, 43184 and 2, that multiplied together give a palindrome (86368).

The spelling of 431842 in words is "four hundred thirty-one thousand, eight hundred forty-two".