239145121 has 4 divisors (see below), whose sum is σ = 239365012. Its totient is φ = 238925232.

The previous prime is 239145119. The next prime is 239145131. The reversal of 239145121 is 121541932.

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 208398096 + 30747025 = 14436^2 + 5545^2 .

It is a cyclic number.

It is not a de Polignac number, because 239145121 - 2¹ = 239145119 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 239145121.

It is not an unprimeable number, because it can be changed into a prime (239145131) 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, 108306 + ... + 110491.

It is an arithmetic number, because the mean of its divisors is an integer number (59841253).

Almost surely, 2^239145121 is an apocalyptic number.

It is an amenable number.

239145121 is a deficient number, since it is larger than the sum of its proper divisors (219891).

239145121 is a wasteful number, since it uses less digits than its factorization.

239145121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219890.

The product of its digits is 2160, while the sum is 28.

The square root of 239145121 is about 15464.3176700429. The cubic root of 239145121 is about 620.7077600817.

The spelling of 239145121 in words is "two hundred thirty-nine million, one hundred forty-five thousand, one hundred twenty-one".