651085 has 8 divisors (see below), whose sum is σ = 786456. Its totient is φ = 517440.

The previous prime is 651071. The next prime is 651097. The reversal of 651085 is 580156.

It can be written as a sum of positive squares in 4 ways, for example, as 335241 + 315844 = 579^2 + 562^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-651085 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 655 + ... + 1315.

It is an arithmetic number, because the mean of its divisors is an integer number (98307).

2⁶⁵¹⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

651085 is a deficient number, since it is larger than the sum of its proper divisors (135371).

651085 is a wasteful number, since it uses less digits than its factorization.

651085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 651085 is about 806.8983826976. The cubic root of 651085 is about 86.6720821731.

The spelling of 651085 in words is "six hundred fifty-one thousand, eighty-five".