1020905745 has 16 divisors (see below), whose sum is σ = 1634618880. Its totient is φ = 544093184.

The previous prime is 1020905729. The next prime is 1020905759. The reversal of 1020905745 is 5475090201.

1020905745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1020905745 - 2⁴ = 1020905729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2064 + ... + 45233.

It is an arithmetic number, because the mean of its divisors is an integer number (102163680).

Almost surely, 2^1020905745 is an apocalyptic number.

1020905745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020905745 is a deficient number, since it is larger than the sum of its proper divisors (613713135).

1020905745 is a wasteful number, since it uses less digits than its factorization.

1020905745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48744.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 1020905745 is about 31951.6156868475. The cubic root of 1020905745 is about 1006.9205767979.

Adding to 1020905745 its reverse (5475090201), we get a palindrome (6495995946).

The spelling of 1020905745 in words is "one billion, twenty million, nine hundred five thousand, seven hundred forty-five".