651140 has 24 divisors (see below), whose sum is σ = 1563072. Its totient is φ = 223200.

The previous prime is 651139. The next prime is 651143. The reversal of 651140 is 41156.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (651143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2186 + ... + 2465.

It is an arithmetic number, because the mean of its divisors is an integer number (65128).

2⁶⁵¹¹⁴⁰ is an apocalyptic number.

It is an amenable number.

651140 is an abundant number, since it is smaller than the sum of its proper divisors (911932).

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

651140 is a wasteful number, since it uses less digits than its factorization.

651140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4667 (or 4665 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 651140 is about 806.9324630971. The cubic root of 651140 is about 86.6745226278.

Adding to 651140 its reverse (41156), we get a palindrome (692296).

The spelling of 651140 in words is "six hundred fifty-one thousand, one hundred forty".