1099125 has 24 divisors (see below), whose sum is σ = 1983384. Its totient is φ = 585600.

The previous prime is 1099121. The next prime is 1099139. The reversal of 1099125 is 5219901.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2916 + 1096209 = 54^2 + 1047^2 .

It is not a de Polignac number, because 1099125 - 2² = 1099121 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 637 + ... + 1613.

It is an arithmetic number, because the mean of its divisors is an integer number (82641).

2^1099125 is an apocalyptic number.

1099125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1099125 is a deficient number, since it is larger than the sum of its proper divisors (884259).

1099125 is an equidigital number, since it uses as much as digits as its factorization.

1099125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998 (or 985 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 1099125 is about 1048.3916253004. The cubic root of 1099125 is about 103.2006332213.

The spelling of 1099125 in words is "one million, ninety-nine thousand, one hundred twenty-five".