1020045641 has 4 divisors (see below), whose sum is σ = 1025744400. Its totient is φ = 1014346884.

The previous prime is 1020045589. The next prime is 1020045661. The reversal of 1020045641 is 1465400201.

1020045641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020045641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020045661) 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, 2849111 + ... + 2849468.

It is an arithmetic number, because the mean of its divisors is an integer number (256436100).

Almost surely, 2^1020045641 is an apocalyptic number.

It is an amenable number.

1020045641 is a deficient number, since it is larger than the sum of its proper divisors (5698759).

1020045641 is an equidigital number, since it uses as much as digits as its factorization.

1020045641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5698758.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1020045641 is about 31938.1533749213. The cubic root of 1020045641 is about 1006.6377234757.

Adding to 1020045641 its reverse (1465400201), we get a palindrome (2485445842).

The spelling of 1020045641 in words is "one billion, twenty million, forty-five thousand, six hundred forty-one".