1986525 has 42 divisors (see below), whose sum is σ = 3727130. Its totient is φ = 1049760.

The previous prime is 1986499. The next prime is 1986527. The reversal of 1986525 is 5256891.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 236196 + 1750329 = 486^2 + 1323^2 .

It is not a de Polignac number, because 1986525 - 2⁶ = 1986461 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1986525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986527) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 18171 + ... + 18279.

2^1986525 is an apocalyptic number.

1986525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1986525 is a deficient number, since it is larger than the sum of its proper divisors (1740605).

1986525 is an equidigital number, since it uses as much as digits as its factorization.

1986525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 117 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 1986525 is about 1409.4413787029. The cubic root of 1986525 is about 125.7085098561.

The spelling of 1986525 in words is "one million, nine hundred eighty-six thousand, five hundred twenty-five".