265122001 has 4 divisors (see below), whose sum is σ = 265514292. Its totient is φ = 264729712.

The previous prime is 265121993. The next prime is 265122007. The reversal of 265122001 is 100221562.

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 122677776 + 142444225 = 11076^2 + 11935^2 .

It is a cyclic number.

It is not a de Polignac number, because 265122001 - 2³ = 265121993 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 265122001.

It is not an unprimeable number, because it can be changed into a prime (265122007) 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, 195130 + ... + 196483.

It is an arithmetic number, because the mean of its divisors is an integer number (66378573).

Almost surely, 2^265122001 is an apocalyptic number.

It is an amenable number.

265122001 is a deficient number, since it is larger than the sum of its proper divisors (392291).

265122001 is an equidigital number, since it uses as much as digits as its factorization.

265122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392290.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 265122001 is about 16282.5673958378. The cubic root of 265122001 is about 642.4143837630.

Adding to 265122001 its reverse (100221562), we get a palindrome (365343563).

It can be divided in two parts, 26512200 and 1, that added together give a square (26512201 = 5149²).

The spelling of 265122001 in words is "two hundred sixty-five million, one hundred twenty-two thousand, one".