1091948 has 48 divisors (see below), whose sum is σ = 2370816. Its totient is φ = 432960.

The previous prime is 1091939. The next prime is 1091957. The reversal of 1091948 is 8491901.

It is an interprime number because it is at equal distance from previous prime (1091939) and next prime (1091957).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13115 + ... + 13197.

It is an arithmetic number, because the mean of its divisors is an integer number (49392).

2^1091948 is an apocalyptic number.

It is an amenable number.

1091948 is an abundant number, since it is smaller than the sum of its proper divisors (1278868).

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

1091948 is a wasteful number, since it uses less digits than its factorization.

1091948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 1091948 is about 1044.9631572453. The cubic root of 1091948 is about 102.9755181076.

The spelling of 1091948 in words is "one million, ninety-one thousand, nine hundred forty-eight".