651120 has 40 divisors (see below), whose sum is σ = 2019216. Its totient is φ = 173568.

The previous prime is 651109. The next prime is 651127. The reversal of 651120 is 21156.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 651120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651127) by changing a digit.

651120 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, 1117 + ... + 1596.

2⁶⁵¹¹²⁰ is an apocalyptic number.

651120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

651120 is an abundant number, since it is smaller than the sum of its proper divisors (1368096).

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

651120 is a wasteful number, since it uses less digits than its factorization.

651120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729 (or 2723 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 651120 is about 806.9200703911. The cubic root of 651120 is about 86.6736352056.

Adding to 651120 its reverse (21156), we get a palindrome (672276).

The spelling of 651120 in words is "six hundred fifty-one thousand, one hundred twenty".