520140425 has 24 divisors (see below), whose sum is σ = 738113472. Its totient is φ = 356184000.

The previous prime is 520140407. The next prime is 520140437. The reversal of 520140425 is 524041025.

It is a happy number.

It is not a de Polignac number, because 520140425 - 2¹⁴ = 520124041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 520140425.

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 23 ways as a sum of consecutive naturals, for example, 168395 + ... + 171455.

It is an arithmetic number, because the mean of its divisors is an integer number (30754728).

Almost surely, 2^520140425 is an apocalyptic number.

It is an amenable number.

520140425 is a deficient number, since it is larger than the sum of its proper divisors (217973047).

520140425 is a wasteful number, since it uses less digits than its factorization.

520140425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4049 (or 4044 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 520140425 is about 22806.5873159489. The cubic root of 520140425 is about 804.2175311535.

The spelling of 520140425 in words is "five hundred twenty million, one hundred forty thousand, four hundred twenty-five".