1999125 has 24 divisors (see below), whose sum is σ = 3605784. Its totient is φ = 1065600.

The previous prime is 1999121. The next prime is 1999163. The reversal of 1999125 is 5219991.

It can be written as a sum of positive squares in 4 ways, for example, as 86436 + 1912689 = 294^2 + 1383^2 .

It is not a de Polignac number, because 1999125 - 2² = 1999121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1999125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999121) 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, 237 + ... + 2013.

It is an arithmetic number, because the mean of its divisors is an integer number (150241).

2^1999125 is an apocalyptic number.

1999125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1999125 is a deficient number, since it is larger than the sum of its proper divisors (1606659).

1999125 is a wasteful number, since it uses less digits than its factorization.

1999125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798 (or 1785 counting only the distinct ones).

The product of its digits is 7290, while the sum is 36.

The square root of 1999125 is about 1413.9041693128. The cubic root of 1999125 is about 125.9737284607.

The spelling of 1999125 in words is "one million, nine hundred ninety-nine thousand, one hundred twenty-five".