1255005 has 18 divisors (see below), whose sum is σ = 2188446. Its totient is φ = 665328.

The previous prime is 1254997. The next prime is 1255013. The reversal of 1255005 is 5005521.

It is an interprime number because it is at equal distance from previous prime (1254997) and next prime (1255013).

It can be written as a sum of positive squares in only one way, i.e., 1004004 + 251001 = 1002^2 + 501^2 .

It is not a de Polignac number, because 1255005 - 2³ = 1254997 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 (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7432 + ... + 7598.

2^1255005 is an apocalyptic number.

1255005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1255005 is a deficient number, since it is larger than the sum of its proper divisors (933441).

1255005 is an equidigital number, since it uses as much as digits as its factorization.

1255005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 1255005 is about 1120.2700567274. The cubic root of 1255005 is about 107.8653156471.

The spelling of 1255005 in words is "one million, two hundred fifty-five thousand, five".