1285755 has 8 divisors (see below), whose sum is σ = 2057232. Its totient is φ = 685728.

The previous prime is 1285747. The next prime is 1285759. The reversal of 1285755 is 5575821.

It is a happy number.

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

It is not a de Polignac number, because 1285755 - 2³ = 1285747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1285759) 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, 42844 + ... + 42873.

It is an arithmetic number, because the mean of its divisors is an integer number (257154).

2^1285755 is an apocalyptic number.

1285755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1285755 is a deficient number, since it is larger than the sum of its proper divisors (771477).

1285755 is an equidigital number, since it uses as much as digits as its factorization.

1285755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85725.

The product of its digits is 14000, while the sum is 33.

The square root of 1285755 is about 1133.9113721980. The cubic root of 1285755 is about 108.7391850786.

The spelling of 1285755 in words is "one million, two hundred eighty-five thousand, seven hundred fifty-five".