421742 has 8 divisors (see below), whose sum is σ = 635376. Its totient is φ = 209952.

The previous prime is 421741. The next prime is 421783. The reversal of 421742 is 247124.

421742 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421741) by changing a digit.

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, 623 + ... + 1109.

It is an arithmetic number, because the mean of its divisors is an integer number (79422).

2⁴²¹⁷⁴² is an apocalyptic number.

421742 is a deficient number, since it is larger than the sum of its proper divisors (213634).

421742 is a wasteful number, since it uses less digits than its factorization.

421742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922.

The product of its digits is 448, while the sum is 20.

The square root of 421742 is about 649.4166613200. The cubic root of 421742 is about 74.9921176901.

Adding to 421742 its reverse (247124), we get a palindrome (668866).

It can be divided in two parts, 42174 and 2, that multiplied together give a palindrome (84348).

The spelling of 421742 in words is "four hundred twenty-one thousand, seven hundred forty-two", and thus it is an iban number.