1125021717 has 12 divisors (see below), whose sum is σ = 1685218080. Its totient is φ = 750014316.

The previous prime is 1125021697. The next prime is 1125021727. The reversal of 1125021717 is 7171205211.

It is not a de Polignac number, because 1125021717 - 2²³ = 1116633109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125021727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2314617 + ... + 2315102.

It is an arithmetic number, because the mean of its divisors is an integer number (140434840).

Almost surely, 2^1125021717 is an apocalyptic number.

It is an amenable number.

1125021717 is a deficient number, since it is larger than the sum of its proper divisors (560196363).

1125021717 is an frugal number, since it uses more digits than its factorization.

1125021717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629734 (or 4629722 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 27.

The square root of 1125021717 is about 33541.3433988563. The cubic root of 1125021717 is about 1040.0486038059.

Adding to 1125021717 its reverse (7171205211), we get a palindrome (8296226928).

The spelling of 1125021717 in words is "one billion, one hundred twenty-five million, twenty-one thousand, seven hundred seventeen".