1421303 has 4 divisors (see below), whose sum is σ = 1530648. Its totient is φ = 1311960.

The previous prime is 1421293. The next prime is 1421309. The reversal of 1421303 is 3031241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3031241 = 19 ⋅159539.

It is not a de Polignac number, because 1421303 - 2¹⁴ = 1404919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421309) 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, 54653 + ... + 54678.

It is an arithmetic number, because the mean of its divisors is an integer number (382662).

2^1421303 is an apocalyptic number.

1421303 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1421303 is a deficient number, since it is larger than the sum of its proper divisors (109345).

1421303 is a wasteful number, since it uses less digits than its factorization.

1421303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109344.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1421303 is about 1192.1841300739. The cubic root of 1421303 is about 112.4334552962.

Adding to 1421303 its reverse (3031241), we get a palindrome (4452544).

The spelling of 1421303 in words is "one million, four hundred twenty-one thousand, three hundred three".