421531135 has 4 divisors (see below), whose sum is σ = 505837368. Its totient is φ = 337224904.

The previous prime is 421531069. The next prime is 421531139. The reversal of 421531135 is 531135124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421531135 - 2¹³ = 421522943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421531139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42153109 + ... + 42153118.

It is an arithmetic number, because the mean of its divisors is an integer number (126459342).

Almost surely, 2^421531135 is an apocalyptic number.

421531135 is a deficient number, since it is larger than the sum of its proper divisors (84306233).

421531135 is an equidigital number, since it uses as much as digits as its factorization.

421531135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84306232.

The product of its digits is 1800, while the sum is 25.

The square root of 421531135 is about 20531.2234170300. The cubic root of 421531135 is about 749.7961727591.

Adding to 421531135 its reverse (531135124), we get a palindrome (952666259).

The spelling of 421531135 in words is "four hundred twenty-one million, five hundred thirty-one thousand, one hundred thirty-five".