1003435421 has 16 divisors (see below), whose sum is σ = 1126856448. Its totient is φ = 888518400.

The previous prime is 1003435393. The next prime is 1003435423. The reversal of 1003435421 is 1245343001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1003435421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003435423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2816 + ... + 44886.

It is an arithmetic number, because the mean of its divisors is an integer number (70428528).

Almost surely, 2^1003435421 is an apocalyptic number.

It is an amenable number.

1003435421 is a deficient number, since it is larger than the sum of its proper divisors (123421027).

1003435421 is a wasteful number, since it uses less digits than its factorization.

1003435421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42172.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1003435421 is about 31677.0488050892. The cubic root of 1003435421 is about 1001.1438314840.

Adding to 1003435421 its reverse (1245343001), we get a palindrome (2248778422).

The spelling of 1003435421 in words is "one billion, three million, four hundred thirty-five thousand, four hundred twenty-one".