259291421 has 8 divisors (see below), whose sum is σ = 266038584. Its totient is φ = 252564480.

The previous prime is 259291411. The next prime is 259291427. The reversal of 259291421 is 124192952.

It can be written as a sum of positive squares in 4 ways, for example, as 27825625 + 231465796 = 5275^2 + 15214^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-259291421 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 (259291427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22895 + ... + 32291.

It is an arithmetic number, because the mean of its divisors is an integer number (33254823).

Almost surely, 2^259291421 is an apocalyptic number.

It is an amenable number.

259291421 is a deficient number, since it is larger than the sum of its proper divisors (6747163).

259291421 is an equidigital number, since it uses as much as digits as its factorization.

259291421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10111.

The product of its digits is 12960, while the sum is 35.

The square root of 259291421 is about 16102.5284039495. The cubic root of 259291421 is about 637.6700935849.

The spelling of 259291421 in words is "two hundred fifty-nine million, two hundred ninety-one thousand, four hundred twenty-one".