1020870765 has 24 divisors (see below), whose sum is σ = 1826592768. Its totient is φ = 526900320.

The previous prime is 1020870761. The next prime is 1020870769. The reversal of 1020870765 is 5670780201.

1020870765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1020870761) and next prime (1020870769).

It is not a de Polignac number, because 1020870765 - 2² = 1020870761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020870761) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 364509 + ... + 367298.

It is an arithmetic number, because the mean of its divisors is an integer number (76108032).

Almost surely, 2^1020870765 is an apocalyptic number.

1020870765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020870765 is a deficient number, since it is larger than the sum of its proper divisors (805722003).

1020870765 is a wasteful number, since it uses less digits than its factorization.

1020870765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731849 (or 731846 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 1020870765 is about 31951.0682919993. The cubic root of 1020870765 is about 1006.9090763943.

The spelling of 1020870765 in words is "one billion, twenty million, eight hundred seventy thousand, seven hundred sixty-five".