259789925 has 6 divisors (see below), whose sum is σ = 322139538. Its totient is φ = 207831920.

The previous prime is 259789919. The next prime is 259789927. The reversal of 259789925 is 529987952.

It is a Cunningham number, because it is equal to 16118²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 259789924 = 1^2 + 16118^2 .

It is not a de Polignac number, because 259789925 - 2⁴ = 259789909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259789927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5195774 + ... + 5195823.

It is an arithmetic number, because the mean of its divisors is an integer number (53689923).

Almost surely, 2^259789925 is an apocalyptic number.

259789925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

259789925 is a deficient number, since it is larger than the sum of its proper divisors (62349613).

259789925 is a wasteful number, since it uses less digits than its factorization.

259789925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10391607 (or 10391602 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 56.

The square root of 259789925 is about 16118.0000310212. Note that the first 4 decimals coincide. The cubic root of 259789925 is about 638.0784855440.

The spelling of 259789925 in words is "two hundred fifty-nine million, seven hundred eighty-nine thousand, nine hundred twenty-five".