1081285 has 8 divisors (see below), whose sum is σ = 1373976. Its totient is φ = 814080.

The previous prime is 1081279. The next prime is 1081291. The reversal of 1081285 is 5821801.

It is an interprime number because it is at equal distance from previous prime (1081279) and next prime (1081291).

It can be written as a sum of positive squares in 4 ways, for example, as 431649 + 649636 = 657^2 + 806^2 .

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

It is not a de Polignac number, because 1081285 - 2³ = 1081277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6276 + ... + 6445.

It is an arithmetic number, because the mean of its divisors is an integer number (171747).

2^1081285 is an apocalyptic number.

It is an amenable number.

1081285 is a deficient number, since it is larger than the sum of its proper divisors (292691).

1081285 is a wasteful number, since it uses less digits than its factorization.

1081285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12743.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 1081285 is about 1039.8485466644. The cubic root of 1081285 is about 102.6392317673.

The spelling of 1081285 in words is "one million, eighty-one thousand, two hundred eighty-five".