1265072885 has 16 divisors (see below), whose sum is σ = 1526152320. Its totient is φ = 1006699200.

The previous prime is 1265072863. The next prime is 1265072903. The reversal of 1265072885 is 5882705621.

It is not a de Polignac number, because 1265072885 - 2¹⁰ = 1265071861 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 971735 + ... + 973035.

It is an arithmetic number, because the mean of its divisors is an integer number (95384520).

Almost surely, 2^1265072885 is an apocalyptic number.

It is an amenable number.

1265072885 is a deficient number, since it is larger than the sum of its proper divisors (261079435).

1265072885 is a wasteful number, since it uses less digits than its factorization.

1265072885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 1265072885 is about 35567.8630929664. The cubic root of 1265072885 is about 1081.5298634708.

The spelling of 1265072885 in words is "one billion, two hundred sixty-five million, seventy-two thousand, eight hundred eighty-five".