1020024421 has 4 divisors (see below), whose sum is σ = 1098487852. Its totient is φ = 941560992.

The previous prime is 1020024419. The next prime is 1020024451. The reversal of 1020024421 is 1244200201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 339075396 + 680949025 = 18414^2 + 26095^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020024421 - 2¹ = 1020024419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020024395 and 1020024404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020024451) 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, 39231696 + ... + 39231721.

It is an arithmetic number, because the mean of its divisors is an integer number (274621963).

Almost surely, 2^1020024421 is an apocalyptic number.

It is an amenable number.

1020024421 is a deficient number, since it is larger than the sum of its proper divisors (78463431).

1020024421 is an equidigital number, since it uses as much as digits as its factorization.

1020024421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78463430.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1020024421 is about 31937.8211686395. The cubic root of 1020024421 is about 1006.6307430689.

Adding to 1020024421 its reverse (1244200201), we get a palindrome (2264224622).

The spelling of 1020024421 in words is "one billion, twenty million, twenty-four thousand, four hundred twenty-one".