421874 has 8 divisors (see below), whose sum is σ = 650028. Its totient is φ = 205200.

The previous prime is 421847. The next prime is 421891. The reversal of 421874 is 478124.

It is a Cunningham number, because it is equal to 75³-1.

It can be written as a sum of positive squares in 2 ways, for example, as 351649 + 70225 = 593^2 + 265^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

421874 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2777 + ... + 2924.

2⁴²¹⁸⁷⁴ is an apocalyptic number.

421874 is a deficient number, since it is larger than the sum of its proper divisors (228154).

421874 is a wasteful number, since it uses less digits than its factorization.

421874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5740.

The product of its digits is 1792, while the sum is 26.

The square root of 421874 is about 649.5182830375. The cubic root of 421874 is about 74.9999407407. Note that the first 4 decimals are identical.

Adding to 421874 its reverse (478124), we get a palindrome (899998).

The spelling of 421874 in words is "four hundred twenty-one thousand, eight hundred seventy-four".