265500121 has 4 divisors (see below), whose sum is σ = 269852644. Its totient is φ = 261147600.

The previous prime is 265500061. The next prime is 265500143. The reversal of 265500121 is 121005562.

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 46785600 + 218714521 = 6840^2 + 14789^2 .

It is a cyclic number.

It is not a de Polignac number, because 265500121 - 2¹³ = 265491929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 265500092 and 265500101.

It is not an unprimeable number, because it can be changed into a prime (265500181) 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, 2176170 + ... + 2176291.

It is an arithmetic number, because the mean of its divisors is an integer number (67463161).

Almost surely, 2^265500121 is an apocalyptic number.

It is an amenable number.

265500121 is a deficient number, since it is larger than the sum of its proper divisors (4352523).

265500121 is an equidigital number, since it uses as much as digits as its factorization.

265500121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4352522.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 265500121 is about 16294.1744497842. The cubic root of 265500121 is about 642.7196449095.

Adding to 265500121 its reverse (121005562), we get a palindrome (386505683).

The spelling of 265500121 in words is "two hundred sixty-five million, five hundred thousand, one hundred twenty-one".