1986485 has 4 divisors (see below), whose sum is σ = 2383788. Its totient is φ = 1589184.

The previous prime is 1986461. The next prime is 1986497. The reversal of 1986485 is 5846891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1343281 + 643204 = 1159^2 + 802^2 .

It is a cyclic number.

It is not a de Polignac number, because 1986485 - 2⁶ = 1986421 is a prime.

It is a super-2 number, since 2×1986485² = 7892245310450, which contains 22 as substring.

It is a d-powerful number, because it can be written as 1 + 9 + 8³ + 6 + 4³ + 8⁵ + 5⁹ .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198644 + ... + 198653.

It is an arithmetic number, because the mean of its divisors is an integer number (595947).

2^1986485 is an apocalyptic number.

It is an amenable number.

1986485 is a deficient number, since it is larger than the sum of its proper divisors (397303).

1986485 is an equidigital number, since it uses as much as digits as its factorization.

1986485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397302.

The product of its digits is 69120, while the sum is 41.

The square root of 1986485 is about 1409.4271886125. The cubic root of 1986485 is about 125.7076661090.

The spelling of 1986485 in words is "one million, nine hundred eighty-six thousand, four hundred eighty-five".