1091005434 has 48 divisors (see below), whose sum is σ = 2394437760. Its totient is φ = 358984800.

The previous prime is 1091005427. The next prime is 1091005439. The reversal of 1091005434 is 4345001901.

1091005434 is a `hidden beast` number, since 10 + 9 + 100 + 543 + 4 = 666.

1091005434 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1091005398 and 1091005407.

It is not an unprimeable number, because it can be changed into a prime (1091005439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 797419 + ... + 798785.

It is an arithmetic number, because the mean of its divisors is an integer number (49884120).

Almost surely, 2^1091005434 is an apocalyptic number.

1091005434 is an abundant number, since it is smaller than the sum of its proper divisors (1303432326).

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

1091005434 is a wasteful number, since it uses less digits than its factorization.

1091005434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915 (or 1912 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1091005434 is about 33030.3713875578. The cubic root of 1091005434 is about 1029.4588019958.

The spelling of 1091005434 in words is "one billion, ninety-one million, five thousand, four hundred thirty-four".