1255387 has 8 divisors (see below), whose sum is σ = 1510400. Its totient is φ = 1019304.

The previous prime is 1255367. The next prime is 1255391. The reversal of 1255387 is 7835521.

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 1255387 - 2⁷ = 1255259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4587 + ... + 4852.

It is an arithmetic number, because the mean of its divisors is an integer number (188800).

2^1255387 is an apocalyptic number.

1255387 is a deficient number, since it is larger than the sum of its proper divisors (255013).

1255387 is an equidigital number, since it uses as much as digits as its factorization.

1255387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9465.

The product of its digits is 8400, while the sum is 31.

The square root of 1255387 is about 1120.4405383598. The cubic root of 1255387 is about 107.8762585970.

The spelling of 1255387 in words is "one million, two hundred fifty-five thousand, three hundred eighty-seven".