1091054 has 4 divisors (see below), whose sum is σ = 1636584. Its totient is φ = 545526.

The previous prime is 1091053. The next prime is 1091059. The reversal of 1091054 is 4501901.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272762 + ... + 272765.

It is an arithmetic number, because the mean of its divisors is an integer number (409146).

2^1091054 is an apocalyptic number.

1091054 is a deficient number, since it is larger than the sum of its proper divisors (545530).

1091054 is an equidigital number, since it uses as much as digits as its factorization.

1091054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545529.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1091054 is about 1044.5353033766. The cubic root of 1091054 is about 102.9474077188.

Adding to 1091054 its reverse (4501901), we get a palindrome (5592955).

The spelling of 1091054 in words is "one million, ninety-one thousand, fifty-four".