431535121 has 4 divisors (see below), whose sum is σ = 432056500. Its totient is φ = 431013744.

The previous prime is 431535113. The next prime is 431535149. The reversal of 431535121 is 121535134.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 155975121 + 275560000 = 12489^2 + 16600^2 .

It is a cyclic number.

It is not a de Polignac number, because 431535121 - 2³ = 431535113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431535151) 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, 259446 + ... + 261103.

It is an arithmetic number, because the mean of its divisors is an integer number (108014125).

Almost surely, 2^431535121 is an apocalyptic number.

It is an amenable number.

431535121 is a deficient number, since it is larger than the sum of its proper divisors (521379).

431535121 is an equidigital number, since it uses as much as digits as its factorization.

431535121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521378.

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

The square root of 431535121 is about 20773.4234299501. The cubic root of 431535121 is about 755.6813701871.

The spelling of 431535121 in words is "four hundred thirty-one million, five hundred thirty-five thousand, one hundred twenty-one".