1866125 has 8 divisors (see below), whose sum is σ = 2329080. Its totient is φ = 1492800.

The previous prime is 1866113. The next prime is 1866127. The reversal of 1866125 is 5216681.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 169 + 1865956 = 13^2 + 1366^2 .

It is not a de Polignac number, because 1866125 - 2²⁰ = 817549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866127) 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, 7340 + ... + 7589.

It is an arithmetic number, because the mean of its divisors is an integer number (291135).

2^1866125 is an apocalyptic number.

It is an amenable number.

1866125 is a deficient number, since it is larger than the sum of its proper divisors (462955).

1866125 is an equidigital number, since it uses as much as digits as its factorization.

1866125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14944 (or 14934 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 1866125 is about 1366.0618580430. The cubic root of 1866125 is about 123.1157392092.

It can be divided in two parts, 1866 and 125, that added together give a palindrome (1991).

The spelling of 1866125 in words is "one million, eight hundred sixty-six thousand, one hundred twenty-five".