1972403 has 4 divisors (see below), whose sum is σ = 1981320. Its totient is φ = 1963488.

The previous prime is 1972381. The next prime is 1972417. The reversal of 1972403 is 3042791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3042791 = 181 ⋅16811.

It is a cyclic number.

It is not a de Polignac number, because 1972403 - 2⁸ = 1972147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1972423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4118 + ... + 4571.

It is an arithmetic number, because the mean of its divisors is an integer number (495330).

2^1972403 is an apocalyptic number.

1972403 is a deficient number, since it is larger than the sum of its proper divisors (8917).

1972403 is an equidigital number, since it uses as much as digits as its factorization.

1972403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8916.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 1972403 is about 1404.4226571798. The cubic root of 1972403 is about 125.4099182667.

The spelling of 1972403 in words is "one million, nine hundred seventy-two thousand, four hundred three".