495986 has 4 divisors (see below), whose sum is σ = 743982. Its totient is φ = 247992.

The previous prime is 495983. The next prime is 496007. The reversal of 495986 is 689594.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689594 = 2 ⋅344797.

It can be written as a sum of positive squares in only one way, i.e., 323761 + 172225 = 569^2 + 415^2 .

It is a super-2 number, since 2×495986² = 492004224392, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (495983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123995 + ... + 123998.

2⁴⁹⁵⁹⁸⁶ is an apocalyptic number.

495986 is a deficient number, since it is larger than the sum of its proper divisors (247996).

495986 is a wasteful number, since it uses less digits than its factorization.

495986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247995.

The product of its digits is 77760, while the sum is 41.

The square root of 495986 is about 704.2627350641. The cubic root of 495986 is about 79.1570874221.

The spelling of 495986 in words is "four hundred ninety-five thousand, nine hundred eighty-six".