1285365 has 8 divisors (see below), whose sum is σ = 2056608. Its totient is φ = 685520.

The previous prime is 1285351. The next prime is 1285381. The reversal of 1285365 is 5635821.

1285365 = T₁₂₂ + T₁₂₃ + ... + T₂₁₁.

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

It is not a de Polignac number, because 1285365 - 2⁶ = 1285301 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42831 + ... + 42860.

It is an arithmetic number, because the mean of its divisors is an integer number (257076).

2^1285365 is an apocalyptic number.

1285365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1285365 is a deficient number, since it is larger than the sum of its proper divisors (771243).

1285365 is an equidigital number, since it uses as much as digits as its factorization.

1285365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85699.

The product of its digits is 7200, while the sum is 30.

The square root of 1285365 is about 1133.7393880429. The cubic root of 1285365 is about 108.7281895751.

The spelling of 1285365 in words is "one million, two hundred eighty-five thousand, three hundred sixty-five".