1955603 has 4 divisors (see below), whose sum is σ = 2106048. Its totient is φ = 1805160.

The previous prime is 1955593. The next prime is 1955609. The reversal of 1955603 is 3065591.

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 1955603 - 2⁴ = 1955587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1955609) 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, 75203 + ... + 75228.

It is an arithmetic number, because the mean of its divisors is an integer number (526512).

2^1955603 is an apocalyptic number.

1955603 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1955603 is a deficient number, since it is larger than the sum of its proper divisors (150445).

1955603 is a wasteful number, since it uses less digits than its factorization.

1955603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150444.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 1955603 is about 1398.4287611459. The cubic root of 1955603 is about 125.0528416589.

The spelling of 1955603 in words is "one million, nine hundred fifty-five thousand, six hundred three".