1091145134 has 4 divisors (see below), whose sum is σ = 1636717704. Its totient is φ = 545572566.

The previous prime is 1091145127. The next prime is 1091145137. The reversal of 1091145134 is 4315411901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4315411901 = 7351 ⋅587051.

It is a junction number, because it is equal to n+sod(n) for n = 1091145097 and 1091145106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091145137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272786282 + ... + 272786285.

It is an arithmetic number, because the mean of its divisors is an integer number (409179426).

Almost surely, 2^1091145134 is an apocalyptic number.

1091145134 is a deficient number, since it is larger than the sum of its proper divisors (545572570).

1091145134 is an equidigital number, since it uses as much as digits as its factorization.

1091145134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545572569.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1091145134 is about 33032.4860402604. The cubic root of 1091145134 is about 1029.5027398328.

The spelling of 1091145134 in words is "one billion, ninety-one million, one hundred forty-five thousand, one hundred thirty-four".