1020171745 has 16 divisors (see below), whose sum is σ = 1232719488. Its totient is φ = 810483840.

The previous prime is 1020171721. The next prime is 1020171749. The reversal of 1020171745 is 5471710201.

It is not a de Polignac number, because 1020171745 - 2¹¹ = 1020169697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020171749) 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 15 ways as a sum of consecutive naturals, for example, 476317 + ... + 478453.

It is an arithmetic number, because the mean of its divisors is an integer number (77044968).

Almost surely, 2^1020171745 is an apocalyptic number.

It is an amenable number.

1020171745 is a deficient number, since it is larger than the sum of its proper divisors (212547743).

1020171745 is a wasteful number, since it uses less digits than its factorization.

1020171745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 1020171745 is about 31940.1275044418. The cubic root of 1020171745 is about 1006.6792039114.

Adding to 1020171745 its reverse (5471710201), we get a palindrome (6491881946).

The spelling of 1020171745 in words is "one billion, twenty million, one hundred seventy-one thousand, seven hundred forty-five".