1956403 has 4 divisors (see below), whose sum is σ = 2041488. Its totient is φ = 1871320.

The previous prime is 1956391. The next prime is 1956419. The reversal of 1956403 is 3046591.

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 1956403 - 2¹⁷ = 1825331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1956433) 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, 42508 + ... + 42553.

It is an arithmetic number, because the mean of its divisors is an integer number (510372).

2^1956403 is an apocalyptic number.

1956403 is a deficient number, since it is larger than the sum of its proper divisors (85085).

1956403 is an equidigital number, since it uses as much as digits as its factorization.

1956403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85084.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1956403 is about 1398.7147672060. The cubic root of 1956403 is about 125.0698915807.

The spelling of 1956403 in words is "one million, nine hundred fifty-six thousand, four hundred three".