421109 has 8 divisors (see below), whose sum is σ = 469560. Its totient is φ = 374976.

The previous prime is 421103. The next prime is 421121. The reversal of 421109 is 901124.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2500 + 418609 = 50^2 + 647^2 .

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 421109 - 2⁴ = 421093 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182 + ... + 935.

It is an arithmetic number, because the mean of its divisors is an integer number (58695).

2⁴²¹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

421109 is a deficient number, since it is larger than the sum of its proper divisors (48451).

421109 is a wasteful number, since it uses less digits than its factorization.

421109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 421109 is about 648.9291178549. The cubic root of 421109 is about 74.9545799065.

The spelling of 421109 in words is "four hundred twenty-one thousand, one hundred nine".