259242397 has 4 divisors (see below), whose sum is σ = 268181820. Its totient is φ = 250302976.

The previous prime is 259242383. The next prime is 259242409. The reversal of 259242397 is 793242952.

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

It can be written as a sum of positive squares in 2 ways, for example, as 136165561 + 123076836 = 11669^2 + 11094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-259242397 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 (259242317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4469668 + ... + 4469725.

It is an arithmetic number, because the mean of its divisors is an integer number (67045455).

Almost surely, 2^259242397 is an apocalyptic number.

It is an amenable number.

259242397 is a deficient number, since it is larger than the sum of its proper divisors (8939423).

259242397 is an equidigital number, since it uses as much as digits as its factorization.

259242397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8939422.

The product of its digits is 272160, while the sum is 43.

The square root of 259242397 is about 16101.0060865773. The cubic root of 259242397 is about 637.6299031447.

The spelling of 259242397 in words is "two hundred fifty-nine million, two hundred forty-two thousand, three hundred ninety-seven".