1003143421 has 4 divisors (see below), whose sum is σ = 1146449632. Its totient is φ = 859837212.

The previous prime is 1003143389. The next prime is 1003143439. The reversal of 1003143421 is 1243413001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1243413001 = 67 ⋅18558403.

It is a cyclic number.

It is not a de Polignac number, because 1003143421 - 2⁵ = 1003143389 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 (1003143481) 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, 71653095 + ... + 71653108.

It is an arithmetic number, because the mean of its divisors is an integer number (286612408).

Almost surely, 2^1003143421 is an apocalyptic number.

It is an amenable number.

1003143421 is a deficient number, since it is larger than the sum of its proper divisors (143306211).

1003143421 is an equidigital number, since it uses as much as digits as its factorization.

1003143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143306210.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1003143421 is about 31672.4394545163. The cubic root of 1003143421 is about 1001.0467110138.

Adding to 1003143421 its reverse (1243413001), we get a palindrome (2246556422).

The spelling of 1003143421 in words is "one billion, three million, one hundred forty-three thousand, four hundred twenty-one".