1024643021 has 4 divisors (see below), whose sum is σ = 1034219232. Its totient is φ = 1015066812.

The previous prime is 1024642967. The next prime is 1024643041. The reversal of 1024643021 is 1203464201.

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: 1203464201 = 1049 ⋅1147249.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1024643021 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 (1024643041) 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, 4787945 + ... + 4788158.

It is an arithmetic number, because the mean of its divisors is an integer number (258554808).

Almost surely, 2^1024643021 is an apocalyptic number.

It is an amenable number.

1024643021 is a deficient number, since it is larger than the sum of its proper divisors (9576211).

1024643021 is an equidigital number, since it uses as much as digits as its factorization.

1024643021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9576210.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1024643021 is about 32010.0456263342. The cubic root of 1024643021 is about 1008.1477738152.

The spelling of 1024643021 in words is "one billion, twenty-four million, six hundred forty-three thousand, twenty-one".