421045 has 8 divisors (see below), whose sum is σ = 510624. Its totient is φ = 333264.

The previous prime is 421037. The next prime is 421049. The reversal of 421045 is 540124.

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

It is a cyclic number.

It is not a de Polignac number, because 421045 - 2³ = 421037 is a prime.

It is a Duffinian number.

421045 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142 + ... + 928.

It is an arithmetic number, because the mean of its divisors is an integer number (63828).

2⁴²¹⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

421045 is a deficient number, since it is larger than the sum of its proper divisors (89579).

421045 is a wasteful number, since it uses less digits than its factorization.

421045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 421045 is about 648.8798039699. The cubic root of 421045 is about 74.9507825237.

Adding to 421045 its reverse (540124), we get a palindrome (961169).

The spelling of 421045 in words is "four hundred twenty-one thousand, forty-five".