1020434421 has 8 divisors (see below), whose sum is σ = 1360782720. Its totient is φ = 680187872.

The previous prime is 1020434417. The next prime is 1020434449. The reversal of 1020434421 is 1244340201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020434421 - 2² = 1020434417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020434461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2281 + ... + 45233.

It is an arithmetic number, because the mean of its divisors is an integer number (170097840).

Almost surely, 2^1020434421 is an apocalyptic number.

It is an amenable number.

1020434421 is a deficient number, since it is larger than the sum of its proper divisors (340348299).

1020434421 is an equidigital number, since it uses as much as digits as its factorization.

1020434421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50875.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1020434421 is about 31944.2392459110. The cubic root of 1020434421 is about 1006.7655971342.

Adding to 1020434421 its reverse (1244340201), we get a palindrome (2264774622).

The spelling of 1020434421 in words is "one billion, twenty million, four hundred thirty-four thousand, four hundred twenty-one".