649085 has 8 divisors (see below), whose sum is σ = 797280. Its totient is φ = 507024.

The previous prime is 649081. The next prime is 649087. The reversal of 649085 is 580946.

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

It is a cyclic number.

It is not a de Polignac number, because 649085 - 2² = 649081 is a prime.

It is a super-2 number, since 2×649085² = 842622674450, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649085.

It is not an unprimeable number, because it can be changed into a prime (649081) 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, 1295 + ... + 1724.

It is an arithmetic number, because the mean of its divisors is an integer number (99660).

2⁶⁴⁹⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

649085 is a deficient number, since it is larger than the sum of its proper divisors (148195).

649085 is a wasteful number, since it uses less digits than its factorization.

649085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3067.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 649085 is about 805.6581160765. The cubic root of 649085 is about 86.5832448423.

The spelling of 649085 in words is "six hundred forty-nine thousand, eighty-five".