1255145 has 8 divisors (see below), whose sum is σ = 1512456. Its totient is φ = 999936.

The previous prime is 1255139. The next prime is 1255147. The reversal of 1255145 is 5415521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 80089 + 1175056 = 283^2 + 1084^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1255145 - 2⁴ = 1255129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1255145.

It is not an unprimeable number, because it can be changed into a prime (1255147) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1529 + ... + 2201.

It is an arithmetic number, because the mean of its divisors is an integer number (189057).

2^1255145 is an apocalyptic number.

It is an amenable number.

1255145 is a deficient number, since it is larger than the sum of its proper divisors (257311).

1255145 is an equidigital number, since it uses as much as digits as its factorization.

1255145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051.

The product of its digits is 1000, while the sum is 23.

The square root of 1255145 is about 1120.3325399184. The cubic root of 1255145 is about 107.8693264101.

The spelling of 1255145 in words is "one million, two hundred fifty-five thousand, one hundred forty-five".