1105251920 has 20 divisors (see below), whose sum is σ = 2569710900. Its totient is φ = 442100736.

The previous prime is 1105251911. The next prime is 1105251937. The reversal of 1105251920 is 291525011.

It can be written as a sum of positive squares in 2 ways, for example, as 180848704 + 924403216 = 13448^2 + 30404^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 1105251920.

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, 6907745 + ... + 6907904.

It is an arithmetic number, because the mean of its divisors is an integer number (128485545).

Almost surely, 2^1105251920 is an apocalyptic number.

1105251920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1105251920 is an abundant number, since it is smaller than the sum of its proper divisors (1464458980).

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

1105251920 is a wasteful number, since it uses less digits than its factorization.

1105251920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13815662 (or 13815656 counting only the distinct ones).

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

The square root of 1105251920 is about 33245.3292960079. The cubic root of 1105251920 is about 1033.9203721852.

Adding to 1105251920 its reverse (291525011), we get a palindrome (1396776931).

The spelling of 1105251920 in words is "one billion, one hundred five million, two hundred fifty-one thousand, nine hundred twenty".