1091950 has 12 divisors (see below), whose sum is σ = 2031120. Its totient is φ = 436760.

The previous prime is 1091939. The next prime is 1091957. The reversal of 1091950 is 591901.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10870 + ... + 10969.

It is an arithmetic number, because the mean of its divisors is an integer number (169260).

2^1091950 is an apocalyptic number.

1091950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1091950 is a deficient number, since it is larger than the sum of its proper divisors (939170).

1091950 is a wasteful number, since it uses less digits than its factorization.

1091950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21851 (or 21846 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 1091950 is about 1044.9641142164. The cubic root of 1091950 is about 102.9755809772.

The spelling of 1091950 in words is "one million, ninety-one thousand, nine hundred fifty".