625520459 has 4 divisors (see below), whose sum is σ = 647090160. Its totient is φ = 603950760.

The previous prime is 625520417. The next prime is 625520461. The reversal of 625520459 is 954025526.

625520459 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954025526 = 2 ⋅477012763.

It is a cyclic number.

It is not a de Polignac number, because 625520459 - 2¹² = 625516363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625520359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10784807 + ... + 10784864.

It is an arithmetic number, because the mean of its divisors is an integer number (161772540).

Almost surely, 2^625520459 is an apocalyptic number.

625520459 is a deficient number, since it is larger than the sum of its proper divisors (21569701).

625520459 is a wasteful number, since it uses less digits than its factorization.

625520459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21569700.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 625520459 is about 25010.4070138812. The cubic root of 625520459 is about 855.2252334580.

The spelling of 625520459 in words is "six hundred twenty-five million, five hundred twenty thousand, four hundred fifty-nine".