1125653111 has 4 divisors (see below), whose sum is σ = 1227985224. Its totient is φ = 1023321000.

The previous prime is 1125653093. The next prime is 1125653141. The reversal of 1125653111 is 1113565211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1113565211 = 11 ⋅101233201.

It is a cyclic number.

It is not a de Polignac number, because 1125653111 - 2⁶ = 1125653047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125653141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51166040 + ... + 51166061.

It is an arithmetic number, because the mean of its divisors is an integer number (306996306).

Almost surely, 2^1125653111 is an apocalyptic number.

1125653111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1125653111 is a deficient number, since it is larger than the sum of its proper divisors (102332113).

1125653111 is a wasteful number, since it uses less digits than its factorization.

1125653111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102332112.

The product of its digits is 900, while the sum is 26.

The square root of 1125653111 is about 33550.7542538167. The cubic root of 1125653111 is about 1040.2431356469.

The spelling of 1125653111 in words is "one billion, one hundred twenty-five million, six hundred fifty-three thousand, one hundred eleven".