1265352001 has 4 divisors (see below), whose sum is σ = 1292274432. Its totient is φ = 1238429572.

The previous prime is 1265351999. The next prime is 1265352029. The reversal of 1265352001 is 1002535621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1265352001 - 2¹ = 1265351999 is a prime.

It is a super-2 number, since 2×1265352001² = 3202231372869408002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1265352031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13461145 + ... + 13461238.

It is an arithmetic number, because the mean of its divisors is an integer number (323068608).

Almost surely, 2^1265352001 is an apocalyptic number.

It is an amenable number.

1265352001 is a deficient number, since it is larger than the sum of its proper divisors (26922431).

1265352001 is an equidigital number, since it uses as much as digits as its factorization.

1265352001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26922430.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1265352001 is about 35571.7865871255. The cubic root of 1265352001 is about 1081.6093977792.

Adding to 1265352001 its reverse (1002535621), we get a palindrome (2267887622).

The spelling of 1265352001 in words is "one billion, two hundred sixty-five million, three hundred fifty-two thousand, one".