235428121 has 4 divisors (see below), whose sum is σ = 249276852. Its totient is φ = 221579392.

The previous prime is 235428047. The next prime is 235428131. The reversal of 235428121 is 121824532.

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 189337600 + 46090521 = 13760^2 + 6789^2 .

It is a cyclic number.

It is not a de Polignac number, because 235428121 - 2¹³ = 235419929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 235428121.

It is not an unprimeable number, because it can be changed into a prime (235428131) 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 3 ways as a sum of consecutive naturals, for example, 6924340 + ... + 6924373.

It is an arithmetic number, because the mean of its divisors is an integer number (62319213).

Almost surely, 2^235428121 is an apocalyptic number.

It is an amenable number.

235428121 is a deficient number, since it is larger than the sum of its proper divisors (13848731).

235428121 is a wasteful number, since it uses less digits than its factorization.

235428121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13848730.

The product of its digits is 3840, while the sum is 28.

The square root of 235428121 is about 15343.6671301224. The cubic root of 235428121 is about 617.4750948011.

The spelling of 235428121 in words is "two hundred thirty-five million, four hundred twenty-eight thousand, one hundred twenty-one".