1265885000001 has 12 divisors (see below), whose sum is σ = 1828545728100. Its totient is φ = 843902484480.

The previous prime is 1265884999997. The next prime is 1265885000047. The reversal of 1265885000001 is 1000005885621.

1265885000001 is a `hidden beast` number, since 1 + 26 + 588 + 50 + 0 + 0 + 0 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1018454364225 + 247430635776 = 1009185^2 + 497424^2 .

It is not a de Polignac number, because 1265885000001 - 2² = 1265884999997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1265885000001.

It is not an unprimeable number, because it can be changed into a prime (1265885002001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1348276 + ... + 2085573.

It is an arithmetic number, because the mean of its divisors is an integer number (152378810675).

Almost surely, 2^{1265885000001} is an apocalyptic number.

It is an amenable number.

1265885000001 is a deficient number, since it is larger than the sum of its proper divisors (562660728099).

1265885000001 is a wasteful number, since it uses less digits than its factorization.

1265885000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3474816 (or 3474813 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The spelling of 1265885000001 in words is "one trillion, two hundred sixty-five billion, eight hundred eighty-five million, one", and thus it is an aban number.