1265061053 has 4 divisors (see below), whose sum is σ = 1265559900. Its totient is φ = 1264562208.

The previous prime is 1265061047. The next prime is 1265061079. The reversal of 1265061053 is 3501605621.

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 1158517369 + 106543684 = 34037^2 + 10322^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265061053 - 2³⁰ = 191319229 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 (1265061013) 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, 245600 + ... + 250697.

It is an arithmetic number, because the mean of its divisors is an integer number (316389975).

Almost surely, 2^1265061053 is an apocalyptic number.

It is an amenable number.

1265061053 is a deficient number, since it is larger than the sum of its proper divisors (498847).

1265061053 is an equidigital number, since it uses as much as digits as its factorization.

1265061053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498846.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 1265061053 is about 35567.6967626525. The cubic root of 1265061053 is about 1081.5264916753.

Adding to 1265061053 its reverse (3501605621), we get a palindrome (4766666674).

The spelling of 1265061053 in words is "one billion, two hundred sixty-five million, sixty-one thousand, fifty-three".