1265525453 has 4 divisors (see below), whose sum is σ = 1267163388. Its totient is φ = 1263887520.

The previous prime is 1265525449. The next prime is 1265525477. The reversal of 1265525453 is 3545255621.

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 231131209 + 1034394244 = 15203^2 + 32162^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265525453 - 2² = 1265525449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265525353) 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, 817808 + ... + 819353.

It is an arithmetic number, because the mean of its divisors is an integer number (316790847).

Almost surely, 2^1265525453 is an apocalyptic number.

It is an amenable number.

1265525453 is a deficient number, since it is larger than the sum of its proper divisors (1637935).

1265525453 is an equidigital number, since it uses as much as digits as its factorization.

1265525453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637934.

The product of its digits is 180000, while the sum is 38.

The square root of 1265525453 is about 35574.2245593632. The cubic root of 1265525453 is about 1081.6588171612.

The spelling of 1265525453 in words is "one billion, two hundred sixty-five million, five hundred twenty-five thousand, four hundred fifty-three".