1215125 has 8 divisors (see below), whose sum is σ = 1516632. Its totient is φ = 972000.

The previous prime is 1215121. The next prime is 1215133. The reversal of 1215125 is 5215121.

It can be written as a sum of positive squares in 4 ways, for example, as 306916 + 908209 = 554^2 + 953^2 .

It is not a de Polignac number, because 1215125 - 2² = 1215121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4736 + ... + 4985.

It is an arithmetic number, because the mean of its divisors is an integer number (189579).

2^1215125 is an apocalyptic number.

It is an amenable number.

1215125 is a deficient number, since it is larger than the sum of its proper divisors (301507).

1215125 is an frugal number, since it uses more digits than its factorization.

1215125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9736 (or 9726 counting only the distinct ones).

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

The square root of 1215125 is about 1102.3270839456. The cubic root of 1215125 is about 106.7104583645.

The spelling of 1215125 in words is "one million, two hundred fifteen thousand, one hundred twenty-five".