421754 has 8 divisors (see below), whose sum is σ = 643188. Its totient is φ = 207360.

The previous prime is 421741. The next prime is 421783. The reversal of 421754 is 457124.

It can be written as a sum of positive squares in 2 ways, for example, as 273529 + 148225 = 523^2 + 385^2 .

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

It is an unprimeable 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, 1607 + ... + 1850.

2⁴²¹⁷⁵⁴ is an apocalyptic number.

421754 is a deficient number, since it is larger than the sum of its proper divisors (221434).

421754 is a wasteful number, since it uses less digits than its factorization.

421754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520.

The product of its digits is 1120, while the sum is 23.

The square root of 421754 is about 649.4259003150. The cubic root of 421754 is about 74.9928289440.

Adding to 421754 its reverse (457124), we get a palindrome (878878).

The spelling of 421754 in words is "four hundred twenty-one thousand, seven hundred fifty-four".