1091238 has 8 divisors (see below), whose sum is σ = 2182488. Its totient is φ = 363744.

The previous prime is 1091221. The next prime is 1091239. The reversal of 1091238 is 8321901.

It is a sphenic number, since it is the product of 3 distinct primes.

1091238 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091239) 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, 90931 + ... + 90942.

It is an arithmetic number, because the mean of its divisors is an integer number (272811).

2^1091238 is an apocalyptic number.

1091238 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1091238 is a wasteful number, since it uses less digits than its factorization.

1091238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181878.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1091238 is about 1044.6233771077. The cubic root of 1091238 is about 102.9531945569.

The spelling of 1091238 in words is "one million, ninety-one thousand, two hundred thirty-eight".