1320705285 has 16 divisors (see below), whose sum is σ = 2115880704. Its totient is φ = 703458752.

The previous prime is 1320705283. The next prime is 1320705301. The reversal of 1320705285 is 5825070231.

It is a cyclic number.

It is not a de Polignac number, because 1320705285 - 2¹ = 1320705283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320705283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45357 + ... + 68546.

It is an arithmetic number, because the mean of its divisors is an integer number (132242544).

Almost surely, 2^1320705285 is an apocalyptic number.

1320705285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1320705285 is a deficient number, since it is larger than the sum of its proper divisors (795175419).

1320705285 is a wasteful number, since it uses less digits than its factorization.

1320705285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114684.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 1320705285 is about 36341.5091183622. The cubic root of 1320705285 is about 1097.1566470033.

The spelling of 1320705285 in words is "one billion, three hundred twenty million, seven hundred five thousand, two hundred eighty-five".