259125891 has 4 divisors (see below), whose sum is σ = 345501192. Its totient is φ = 172750592.

The previous prime is 259125877. The next prime is 259125907. The reversal of 259125891 is 198521952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 259125891 - 2⁹ = 259125379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (259125871) 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, 43187646 + ... + 43187651.

It is an arithmetic number, because the mean of its divisors is an integer number (86375298).

Almost surely, 2^259125891 is an apocalyptic number.

259125891 is a deficient number, since it is larger than the sum of its proper divisors (86375301).

259125891 is an equidigital number, since it uses as much as digits as its factorization.

259125891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86375300.

The product of its digits is 64800, while the sum is 42.

The square root of 259125891 is about 16097.3877073269. The cubic root of 259125891 is about 637.5343698502.

It can be divided in two parts, 2591 and 25891, that added together give a palindrome (28482).

The spelling of 259125891 in words is "two hundred fifty-nine million, one hundred twenty-five thousand, eight hundred ninety-one".