1265790847 has 8 divisors (see below), whose sum is σ = 1278913536. Its totient is φ = 1252692312.

The previous prime is 1265790821. The next prime is 1265790881. The reversal of 1265790847 is 7480975621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1265790847 - 2⁷ = 1265790719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265790847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265790247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110868 + ... + 121750.

It is an arithmetic number, because the mean of its divisors is an integer number (159864192).

Almost surely, 2^1265790847 is an apocalyptic number.

1265790847 is a deficient number, since it is larger than the sum of its proper divisors (13122689).

1265790847 is a wasteful number, since it uses less digits than its factorization.

1265790847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12077.

The product of its (nonzero) digits is 846720, while the sum is 49.

The square root of 1265790847 is about 35577.9545083750. The cubic root of 1265790847 is about 1081.7344236204.

The spelling of 1265790847 in words is "one billion, two hundred sixty-five million, seven hundred ninety thousand, eight hundred forty-seven".