1131645105 has 24 divisors (see below), whose sum is σ = 2029159080. Its totient is φ = 582731520.

The previous prime is 1131645083. The next prime is 1131645127. The reversal of 1131645105 is 5015461311.

1131645105 is a `hidden beast` number, since 1 + 1 + 3 + 1 + 645 + 10 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1131645083) and next prime (1131645127).

It can be written as a sum of positive squares in 4 ways, for example, as 475414416 + 656230689 = 21804^2 + 25617^2 .

It is not a de Polignac number, because 1131645105 - 2⁶ = 1131645041 is a prime.

It is a super-2 number, since 2×1131645105² = 2561241287340922050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 432276 + ... + 434885.

It is an arithmetic number, because the mean of its divisors is an integer number (84548295).

Almost surely, 2^1131645105 is an apocalyptic number.

1131645105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131645105 is a deficient number, since it is larger than the sum of its proper divisors (897513975).

1131645105 is a wasteful number, since it uses less digits than its factorization.

1131645105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867201 (or 867198 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 1131645105 is about 33639.9331895888. The cubic root of 1131645105 is about 1042.0856521510.

The spelling of 1131645105 in words is "one billion, one hundred thirty-one million, six hundred forty-five thousand, one hundred five".