1605255 has 16 divisors (see below), whose sum is σ = 2595840. Its totient is φ = 847008.

The previous prime is 1605217. The next prime is 1605257. The reversal of 1605255 is 5525061.

It is not a de Polignac number, because 1605255 - 2⁷ = 1605127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605257) 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, 1026 + ... + 2064.

It is an arithmetic number, because the mean of its divisors is an integer number (162240).

2^1605255 is an apocalyptic number.

1605255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1605255 is a deficient number, since it is larger than the sum of its proper divisors (990585).

1605255 is a wasteful number, since it uses less digits than its factorization.

1605255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1605255 is about 1266.9865824072. The cubic root of 1605255 is about 117.0886172084.

The spelling of 1605255 in words is "one million, six hundred five thousand, two hundred fifty-five".