1105380243 has 32 divisors (see below), whose sum is σ = 1820206080. Its totient is φ = 657277920.

The previous prime is 1105380223. The next prime is 1105380293. The reversal of 1105380243 is 3420835011.

It is a happy number.

It is not a de Polignac number, because 1105380243 - 2⁶ = 1105380179 is a prime.

It is a super-2 number, since 2×1105380243² = 2443730963229478098, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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 (1105380203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19371 + ... + 50852.

It is an arithmetic number, because the mean of its divisors is an integer number (56881440).

Almost surely, 2^1105380243 is an apocalyptic number.

1105380243 is a deficient number, since it is larger than the sum of its proper divisors (714825837).

1105380243 is a wasteful number, since it uses less digits than its factorization.

1105380243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70296 (or 70290 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1105380243 is about 33247.2591802693. The cubic root of 1105380243 is about 1033.9603843692.

The spelling of 1105380243 in words is "one billion, one hundred five million, three hundred eighty thousand, two hundred forty-three".