1090139 has 4 divisors (see below), whose sum is σ = 1127760. Its totient is φ = 1052520.

The previous prime is 1090129. The next prime is 1090151. The reversal of 1090139 is 9310901.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1090139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1090129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18767 + ... + 18824.

It is an arithmetic number, because the mean of its divisors is an integer number (281940).

2^1090139 is an apocalyptic number.

1090139 is a deficient number, since it is larger than the sum of its proper divisors (37621).

1090139 is an equidigital number, since it uses as much as digits as its factorization.

1090139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37620.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 1090139 is about 1044.0972176957. The cubic root of 1090139 is about 102.9186211135.

The spelling of 1090139 in words is "one million, ninety thousand, one hundred thirty-nine".