1251125 has 8 divisors (see below), whose sum is σ = 1561560. Its totient is φ = 1000800.

The previous prime is 1251121. The next prime is 1251157. The reversal of 1251125 is 5211521.

It can be written as a sum of positive squares in 4 ways, for example, as 27889 + 1223236 = 167^2 + 1106^2 .

It is not a de Polignac number, because 1251125 - 2² = 1251121 is a prime.

1251125 is a modest number, since divided by 1125 gives 125 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251121) 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 7 ways as a sum of consecutive naturals, for example, 4880 + ... + 5129.

It is an arithmetic number, because the mean of its divisors is an integer number (195195).

2^1251125 is an apocalyptic number.

It is an amenable number.

1251125 is a deficient number, since it is larger than the sum of its proper divisors (310435).

1251125 is an equidigital number, since it uses as much as digits as its factorization.

1251125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10024 (or 10014 counting only the distinct ones).

The product of its digits is 100, while the sum is 17.

The square root of 1251125 is about 1118.5369908948. The cubic root of 1251125 is about 107.7540413318.

Adding to 1251125 its reverse (5211521), we get a palindrome (6462646).

It can be divided in two parts, 125 and 1125, that multiplied together give a square (140625 = 375²).

The spelling of 1251125 in words is "one million, two hundred fifty-one thousand, one hundred twenty-five".