1265872053 has 4 divisors (see below), whose sum is σ = 1687829408. Its totient is φ = 843914700.

The previous prime is 1265872051. The next prime is 1265872079. The reversal of 1265872053 is 3502785621.

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 not a de Polignac number, because 1265872053 - 2¹ = 1265872051 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 (1265872051) 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, 210978673 + ... + 210978678.

It is an arithmetic number, because the mean of its divisors is an integer number (421957352).

Almost surely, 2^1265872053 is an apocalyptic number.

It is an amenable number.

1265872053 is a deficient number, since it is larger than the sum of its proper divisors (421957355).

1265872053 is an equidigital number, since it uses as much as digits as its factorization.

1265872053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421957354.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 1265872053 is about 35579.0957304988. The cubic root of 1265872053 is about 1081.7575557851.

The spelling of 1265872053 in words is "one billion, two hundred sixty-five million, eight hundred seventy-two thousand, fifty-three".