1245255 has 16 divisors (see below), whose sum is σ = 2173824. Its totient is φ = 603680.

The previous prime is 1245227. The next prime is 1245281. The reversal of 1245255 is 5525421.

It is a happy number.

It is not a de Polignac number, because 1245255 - 2⁶ = 1245191 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 (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3609 + ... + 3938.

It is an arithmetic number, because the mean of its divisors is an integer number (135864).

2^1245255 is an apocalyptic number.

1245255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1245255 is a deficient number, since it is larger than the sum of its proper divisors (928569).

1245255 is a wasteful number, since it uses less digits than its factorization.

1245255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7566.

The product of its digits is 2000, while the sum is 24.

The square root of 1245255 is about 1115.9099426029. The cubic root of 1245255 is about 107.5852577657.

The spelling of 1245255 in words is "one million, two hundred forty-five thousand, two hundred fifty-five".