2091000 has 128 divisors (see below), whose sum is σ = 7076160. Its totient is φ = 512000.

The previous prime is 2090989. The next prime is 2091053. The reversal of 2091000 is 1902.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50980 + ... + 51020.

2^2091000 is an apocalyptic number.

2091000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2091000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3538080).

2091000 is an abundant number, since it is smaller than the sum of its proper divisors (4985160).

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

2091000 is a wasteful number, since it uses less digits than its factorization.

2091000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 2091000 is about 1446.0290453514. The cubic root of 2091000 is about 127.8747146513.

Adding to 2091000 its reverse (1902), we get a palindrome (2092902).

The spelling of 2091000 in words is "two million, ninety-one thousand".