1105640145 has 16 divisors (see below), whose sum is σ = 1965582720. Its totient is φ = 589674672.

The previous prime is 1105640113. The next prime is 1105640149. The reversal of 1105640145 is 5410465011.

1105640145 is a `hidden beast` number, since 1 + 1 + 0 + 5 + 640 + 14 + 5 = 666.

It is not a de Polignac number, because 1105640145 - 2⁵ = 1105640113 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1105640149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4094829 + ... + 4095098.

It is an arithmetic number, because the mean of its divisors is an integer number (122848920).

Almost surely, 2^1105640145 is an apocalyptic number.

1105640145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1105640145 is a deficient number, since it is larger than the sum of its proper divisors (859942575).

1105640145 is an equidigital number, since it uses as much as digits as its factorization.

1105640145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8189941 (or 8189935 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1105640145 is about 33251.1675734853. The cubic root of 1105640145 is about 1034.0414144988.

The spelling of 1105640145 in words is "one billion, one hundred five million, six hundred forty thousand, one hundred forty-five".