52120720 has 20 divisors (see below), whose sum is σ = 121180860. Its totient is φ = 20848256.

The previous prime is 52120711. The next prime is 52120729. The reversal of 52120720 is 2702125.

It is an interprime number because it is at equal distance from previous prime (52120711) and next prime (52120729).

It can be written as a sum of positive squares in 2 ways, for example, as 28772496 + 23348224 = 5364^2 + 4832^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (52120729) 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 3 ways as a sum of consecutive naturals, for example, 325675 + ... + 325834.

It is an arithmetic number, because the mean of its divisors is an integer number (6059043).

Almost surely, 2^52120720 is an apocalyptic number.

It is an amenable number.

52120720 is an abundant number, since it is smaller than the sum of its proper divisors (69060140).

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

52120720 is a wasteful number, since it uses less digits than its factorization.

52120720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651522 (or 651516 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 52120720 is about 7219.4681244535. The cubic root of 52120720 is about 373.5397313929.

Adding to 52120720 its reverse (2702125), we get a palindrome (54822845).

The spelling of 52120720 in words is "fifty-two million, one hundred twenty thousand, seven hundred twenty".