1420021403 has 4 divisors (see below), whose sum is σ = 1481761488. Its totient is φ = 1358281320.

The previous prime is 1420021391. The next prime is 1420021469. The reversal of 1420021403 is 3041200241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3041200241 = 43 ⋅70725587.

It is a cyclic number.

It is not a de Polignac number, because 1420021403 - 2¹⁸ = 1419759259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420023403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30870008 + ... + 30870053.

It is an arithmetic number, because the mean of its divisors is an integer number (370440372).

Almost surely, 2^1420021403 is an apocalyptic number.

1420021403 is a deficient number, since it is larger than the sum of its proper divisors (61740085).

1420021403 is an equidigital number, since it uses as much as digits as its factorization.

1420021403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61740084.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1420021403 is about 37683.1713500868. The cubic root of 1420021403 is about 1123.9965117165.

Adding to 1420021403 its reverse (3041200241), we get a palindrome (4461221644).

The spelling of 1420021403 in words is "one billion, four hundred twenty million, twenty-one thousand, four hundred three".