421138 has 16 divisors (see below), whose sum is σ = 670680. Its totient is φ = 198016.

The previous prime is 421133. The next prime is 421147. The reversal of 421138 is 831124.

It can be written as a sum of positive squares in 4 ways, for example, as 400689 + 20449 = 633^2 + 143^2 .

It is not an unprimeable number, because it can be changed into a prime (421133) 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, 3006 + ... + 3142.

2⁴²¹¹³⁸ is an apocalyptic number.

421138 is a deficient number, since it is larger than the sum of its proper divisors (249542).

421138 is a wasteful number, since it uses less digits than its factorization.

421138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221.

The product of its digits is 192, while the sum is 19.

The square root of 421138 is about 648.9514619754. The cubic root of 421138 is about 74.9563004689.

The spelling of 421138 in words is "four hundred twenty-one thousand, one hundred thirty-eight".