1099260 has 72 divisors (see below), whose sum is σ = 3459456. Its totient is φ = 282240.

The previous prime is 1099249. The next prime is 1099261. The reversal of 1099260 is 629901.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5482 + ... + 5678.

It is an arithmetic number, because the mean of its divisors is an integer number (48048).

2^1099260 is an apocalyptic number.

1099260 is a gapful number since it is divisible by the number (10) 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 1099260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1729728).

1099260 is an abundant number, since it is smaller than the sum of its proper divisors (2360196).

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

1099260 is a wasteful number, since it uses less digits than its factorization.

1099260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 1099260 is about 1048.4560076608. The cubic root of 1099260 is about 103.2048582534.

The spelling of 1099260 in words is "one million, ninety-nine thousand, two hundred sixty".