1986245 has 8 divisors (see below), whose sum is σ = 2441880. Its totient is φ = 1550080.

The previous prime is 1986233. The next prime is 1986253. The reversal of 1986245 is 5426891.

It can be written as a sum of positive squares in 4 ways, for example, as 9409 + 1976836 = 97^2 + 1406^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1986245 - 2⁸ = 1985989 is a prime.

It is a d-powerful number, because it can be written as 1 + 9² + 8 + 6 + 2¹⁵ + 4⁴ + 5⁹ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4640 + ... + 5049.

It is an arithmetic number, because the mean of its divisors is an integer number (305235).

2^1986245 is an apocalyptic number.

It is an amenable number.

1986245 is a deficient number, since it is larger than the sum of its proper divisors (455635).

1986245 is an equidigital number, since it uses as much as digits as its factorization.

1986245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9735.

The product of its digits is 17280, while the sum is 35.

The square root of 1986245 is about 1409.3420450693. The cubic root of 1986245 is about 125.7026033885.

The spelling of 1986245 in words is "one million, nine hundred eighty-six thousand, two hundred forty-five".