1255603 has 4 divisors (see below), whose sum is σ = 1329480. Its totient is φ = 1181728.

The previous prime is 1255601. The next prime is 1255609. The reversal of 1255603 is 3065521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1255603 - 2¹ = 1255601 is a prime.

It is a Duffinian number.

1255603 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1255601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36913 + ... + 36946.

It is an arithmetic number, because the mean of its divisors is an integer number (332370).

2^1255603 is an apocalyptic number.

1255603 is a deficient number, since it is larger than the sum of its proper divisors (73877).

1255603 is an equidigital number, since it uses as much as digits as its factorization.

1255603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73876.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 1255603 is about 1120.5369248713. The cubic root of 1255603 is about 107.8824452512.

The spelling of 1255603 in words is "one million, two hundred fifty-five thousand, six hundred three".