1105123240 has 32 divisors (see below), whose sum is σ = 2677799880. Its totient is φ = 408045312.

The previous prime is 1105123223. The next prime is 1105123273. The reversal of 1105123240 is 423215011.

It can be written as a sum of positive squares in 4 ways, for example, as 560647684 + 544475556 = 23678^2 + 23334^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1062099 + ... + 1063138.

Almost surely, 2^1105123240 is an apocalyptic number.

1105123240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1105123240 is an abundant number, since it is smaller than the sum of its proper divisors (1572676640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1105123240 is a wasteful number, since it uses less digits than its factorization.

1105123240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125261 (or 2125257 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1105123240 is about 33243.3939302232. The cubic root of 1105123240 is about 1033.8802455755.

Adding to 1105123240 its reverse (423215011), we get a palindrome (1528338251).

The spelling of 1105123240 in words is "one billion, one hundred five million, one hundred twenty-three thousand, two hundred forty".