1001426403 has 4 divisors (see below), whose sum is σ = 1335235208. Its totient is φ = 667617600.

The previous prime is 1001426359. The next prime is 1001426431. The reversal of 1001426403 is 3046241001.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1001426403 - 2⁶ = 1001426339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001426403.

It is not an unprimeable number, because it can be changed into a prime (1001426443) 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, 166904398 + ... + 166904403.

It is an arithmetic number, because the mean of its divisors is an integer number (333808802).

Almost surely, 2^1001426403 is an apocalyptic number.

1001426403 is a deficient number, since it is larger than the sum of its proper divisors (333808805).

1001426403 is an equidigital number, since it uses as much as digits as its factorization.

1001426403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333808804.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1001426403 is about 31645.3219765576. The cubic root of 1001426403 is about 1000.4752417761.

Adding to 1001426403 its reverse (3046241001), we get a palindrome (4047667404).

The spelling of 1001426403 in words is "one billion, one million, four hundred twenty-six thousand, four hundred three".