1125111566 has 8 divisors (see below), whose sum is σ = 1696992024. Its totient is φ = 559447560.

The previous prime is 1125111557. The next prime is 1125111571. The reversal of 1125111566 is 6651115211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1553660 + ... + 1554383.

It is an arithmetic number, because the mean of its divisors is an integer number (212124003).

Almost surely, 2^1125111566 is an apocalyptic number.

1125111566 is a deficient number, since it is larger than the sum of its proper divisors (571880458).

1125111566 is a wasteful number, since it uses less digits than its factorization.

1125111566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108226.

The product of its digits is 1800, while the sum is 29.

The square root of 1125111566 is about 33542.6827489991. The cubic root of 1125111566 is about 1040.0762906313.

Adding to 1125111566 its reverse (6651115211), we get a palindrome (7776226777).

The spelling of 1125111566 in words is "one billion, one hundred twenty-five million, one hundred eleven thousand, five hundred sixty-six".