259999421 has 8 divisors (see below), whose sum is σ = 284551488. Its totient is φ = 235600000.

The previous prime is 259999391. The next prime is 259999423. The reversal of 259999421 is 124999952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 259999421 - 2¹⁰ = 259998397 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 259999421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259999423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34580 + ... + 41421.

It is an arithmetic number, because the mean of its divisors is an integer number (35568936).

Almost surely, 2^259999421 is an apocalyptic number.

It is an amenable number.

259999421 is a deficient number, since it is larger than the sum of its proper divisors (24552067).

259999421 is a wasteful number, since it uses less digits than its factorization.

259999421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76323.

The product of its digits is 524880, while the sum is 50.

The square root of 259999421 is about 16124.4975425593. The cubic root of 259999421 is about 638.2499561074.

The spelling of 259999421 in words is "two hundred fifty-nine million, nine hundred ninety-nine thousand, four hundred twenty-one".