1211125 has 8 divisors (see below), whose sum is σ = 1511640. Its totient is φ = 968800.

The previous prime is 1211087. The next prime is 1211141. The reversal of 1211125 is 5211121.

It can be written as a sum of positive squares in 4 ways, for example, as 40401 + 1170724 = 201^2 + 1082^2 .

It is not a de Polignac number, because 1211125 - 2⁹ = 1210613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4720 + ... + 4969.

It is an arithmetic number, because the mean of its divisors is an integer number (188955).

2^1211125 is an apocalyptic number.

It is an amenable number.

1211125 is a deficient number, since it is larger than the sum of its proper divisors (300515).

1211125 is an frugal number, since it uses more digits than its factorization.

1211125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9704 (or 9694 counting only the distinct ones).

The product of its digits is 20, while the sum is 13.

The square root of 1211125 is about 1100.5112448312. The cubic root of 1211125 is about 106.5932383097.

Adding to 1211125 its reverse (5211121), we get a palindrome (6422246).

The spelling of 1211125 in words is "one million, two hundred eleven thousand, one hundred twenty-five".