1866925 has 12 divisors (see below), whose sum is σ = 2360340. Its totient is φ = 1464320.

The previous prime is 1866901. The next prime is 1866941. The reversal of 1866925 is 5296681.

It can be written as a sum of positive squares in 6 ways, for example, as 236196 + 1630729 = 486^2 + 1277^2 .

It is not a de Polignac number, because 1866925 - 2¹³ = 1858733 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 11 ways as a sum of consecutive naturals, for example, 621 + ... + 2029.

It is an arithmetic number, because the mean of its divisors is an integer number (196695).

2^1866925 is an apocalyptic number.

It is an amenable number.

1866925 is a deficient number, since it is larger than the sum of its proper divisors (493415).

1866925 is a wasteful number, since it uses less digits than its factorization.

1866925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472 (or 1467 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 1866925 is about 1366.3546391768. The cubic root of 1866925 is about 123.1333297636.

The spelling of 1866925 in words is "one million, eight hundred sixty-six thousand, nine hundred twenty-five".