1024012421 has 4 divisors (see below), whose sum is σ = 1024428972. Its totient is φ = 1023595872.

The previous prime is 1024012411. The next prime is 1024012471. The reversal of 1024012421 is 1242104201.

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 790228321 + 233784100 = 28111^2 + 15290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1024012421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1024012421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1024012411) 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, 204566 + ... + 209511.

It is an arithmetic number, because the mean of its divisors is an integer number (256107243).

Almost surely, 2^1024012421 is an apocalyptic number.

It is an amenable number.

1024012421 is a deficient number, since it is larger than the sum of its proper divisors (416551).

1024012421 is an equidigital number, since it uses as much as digits as its factorization.

1024012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416550.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1024012421 is about 32000.1940775365. The cubic root of 1024012421 is about 1007.9409152847.

Adding to 1024012421 its reverse (1242104201), we get a palindrome (2266116622).

The spelling of 1024012421 in words is "one billion, twenty-four million, twelve thousand, four hundred twenty-one".