1125111565 has 16 divisors (see below), whose sum is σ = 1364283648. Its totient is φ = 890705536.

The previous prime is 1125111557. The next prime is 1125111571. The reversal of 1125111565 is 5651115211.

It is a cyclic number.

It is not a de Polignac number, because 1125111565 - 2³ = 1125111557 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 191664 + ... + 197446.

It is an arithmetic number, because the mean of its divisors is an integer number (85267728).

Almost surely, 2^1125111565 is an apocalyptic number.

It is an amenable number.

1125111565 is a deficient number, since it is larger than the sum of its proper divisors (239172083).

1125111565 is a wasteful number, since it uses less digits than its factorization.

1125111565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6188.

The product of its digits is 1500, while the sum is 28.

The square root of 1125111565 is about 33542.6827340927. The cubic root of 1125111565 is about 1040.0762903231.

Adding to 1125111565 its reverse (5651115211), we get a palindrome (6776226776).

The spelling of 1125111565 in words is "one billion, one hundred twenty-five million, one hundred eleven thousand, five hundred sixty-five".