131123065 has 8 divisors (see below), whose sum is σ = 162773640. Its totient is φ = 101281152.

The previous prime is 131123063. The next prime is 131123081. The reversal of 131123065 is 560321131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 318096 + 130804969 = 564^2 + 11437^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131123065 - 2¹ = 131123063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131123063) 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, 452004 + ... + 452293.

It is an arithmetic number, because the mean of its divisors is an integer number (20346705).

Almost surely, 2^131123065 is an apocalyptic number.

It is an amenable number.

131123065 is a deficient number, since it is larger than the sum of its proper divisors (31650575).

131123065 is an equidigital number, since it uses as much as digits as its factorization.

131123065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904331.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 131123065 is about 11450.8979997204. The cubic root of 131123065 is about 508.0342953782.

Adding to 131123065 its reverse (560321131), we get a palindrome (691444196).

The spelling of 131123065 in words is "one hundred thirty-one million, one hundred twenty-three thousand, sixty-five".