1020777745 has 12 divisors (see below), whose sum is σ = 1326408156. Its totient is φ = 753804480.

The previous prime is 1020777727. The next prime is 1020777749. The reversal of 1020777745 is 5477770201.

It can be written as a sum of positive squares in 6 ways, for example, as 495863824 + 524913921 = 22268^2 + 22911^2 .

It is not a de Polignac number, because 1020777745 - 2⁷ = 1020777617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020777698 and 1020777707.

It is not an unprimeable number, because it can be changed into a prime (1020777749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 603166 + ... + 604855.

It is an arithmetic number, because the mean of its divisors is an integer number (110534013).

Almost surely, 2^1020777745 is an apocalyptic number.

It is an amenable number.

1020777745 is a deficient number, since it is larger than the sum of its proper divisors (305630411).

1020777745 is a wasteful number, since it uses less digits than its factorization.

1020777745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208052 (or 1208039 counting only the distinct ones).

The product of its (nonzero) digits is 96040, while the sum is 40.

The square root of 1020777745 is about 31949.6125954604. The cubic root of 1020777745 is about 1006.8784928538.

The spelling of 1020777745 in words is "one billion, twenty million, seven hundred seventy-seven thousand, seven hundred forty-five".