651320 has 32 divisors (see below), whose sum is σ = 1544400. Its totient is φ = 246528.

The previous prime is 651293. The next prime is 651323. The reversal of 651320 is 23156.

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 651320.

It is not an unprimeable number, because it can be changed into a prime (651323) by changing a digit.

651320 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332 + ... + 1188.

2⁶⁵¹³²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772200).

651320 is an abundant number, since it is smaller than the sum of its proper divisors (893080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651320 is a wasteful number, since it uses less digits than its factorization.

651320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887 (or 883 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 651320 is about 807.0439888878. The cubic root of 651320 is about 86.6825086096.

Adding to 651320 its reverse (23156), we get a palindrome (674476).

The spelling of 651320 in words is "six hundred fifty-one thousand, three hundred twenty".