1266526315 has 4 divisors (see below), whose sum is σ = 1519831584. Its totient is φ = 1013221048.

The previous prime is 1266526307. The next prime is 1266526321. The reversal of 1266526315 is 5136256621.

1266526315 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5136256621 = 1543 ⋅3328747.

It is a cyclic number.

It is not a de Polignac number, because 1266526315 - 2³ = 1266526307 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126652627 + ... + 126652636.

It is an arithmetic number, because the mean of its divisors is an integer number (379957896).

Almost surely, 2^1266526315 is an apocalyptic number.

1266526315 is a deficient number, since it is larger than the sum of its proper divisors (253305269).

1266526315 is an equidigital number, since it uses as much as digits as its factorization.

1266526315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253305268.

The product of its digits is 64800, while the sum is 37.

The square root of 1266526315 is about 35588.2890147869. The cubic root of 1266526315 is about 1081.9438913530.

The spelling of 1266526315 in words is "one billion, two hundred sixty-six million, five hundred twenty-six thousand, three hundred fifteen".