1255403 has 4 divisors (see below), whose sum is σ = 1257648. Its totient is φ = 1253160.

The previous prime is 1255393. The next prime is 1255421. The reversal of 1255403 is 3045521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1255403 - 2⁸ = 1255147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255453) 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 3 ways as a sum of consecutive naturals, for example, 473 + ... + 1653.

It is an arithmetic number, because the mean of its divisors is an integer number (314412).

2^1255403 is an apocalyptic number.

1255403 is a deficient number, since it is larger than the sum of its proper divisors (2245).

1255403 is a wasteful number, since it uses less digits than its factorization.

1255403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1255403 is about 1120.4476783857. The cubic root of 1255403 is about 107.8767168921.

The spelling of 1255403 in words is "one million, two hundred fifty-five thousand, four hundred three".