1021032643 has 4 divisors (see below), whose sum is σ = 1021190040. Its totient is φ = 1020875248.

The previous prime is 1021032637. The next prime is 1021032671. The reversal of 1021032643 is 3462301201.

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

It is a cyclic number.

It is not a de Polignac number, because 1021032643 - 2²⁵ = 987478211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021032673) 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, 68530 + ... + 82087.

It is an arithmetic number, because the mean of its divisors is an integer number (255297510).

Almost surely, 2^1021032643 is an apocalyptic number.

1021032643 is a deficient number, since it is larger than the sum of its proper divisors (157397).

1021032643 is an equidigital number, since it uses as much as digits as its factorization.

1021032643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157396.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1021032643 is about 31953.6014089179. The cubic root of 1021032643 is about 1006.9622949533.

Adding to 1021032643 its reverse (3462301201), we get a palindrome (4483333844).

The spelling of 1021032643 in words is "one billion, twenty-one million, thirty-two thousand, six hundred forty-three".