259868421 has 24 divisors (see below), whose sum is σ = 392386176. Its totient is φ = 165417120.

The previous prime is 259868419. The next prime is 259868461. The reversal of 259868421 is 124868952.

It is not a de Polignac number, because 259868421 - 2¹ = 259868419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259868461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 219451 + ... + 220631.

It is an arithmetic number, because the mean of its divisors is an integer number (16349424).

Almost surely, 2^259868421 is an apocalyptic number.

It is an amenable number.

259868421 is a deficient number, since it is larger than the sum of its proper divisors (132517755).

259868421 is a wasteful number, since it uses less digits than its factorization.

259868421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273 (or 2270 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 259868421 is about 16120.4348886747. The cubic root of 259868421 is about 638.1427445988.

The spelling of 259868421 in words is "two hundred fifty-nine million, eight hundred sixty-eight thousand, four hundred twenty-one".