258397 has 4 divisors (see below), whose sum is σ = 259740. Its totient is φ = 257056.

The previous prime is 258389. The next prime is 258403. The reversal of 258397 is 793852.

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 22201 + 236196 = 149^2 + 486^2 .

It is a cyclic number.

It is not a de Polignac number, because 258397 - 2³ = 258389 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 (258317) 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, 322 + ... + 787.

It is an arithmetic number, because the mean of its divisors is an integer number (64935).

2²⁵⁸³⁹⁷ is an apocalyptic number.

It is an amenable number.

258397 is a deficient number, since it is larger than the sum of its proper divisors (1343).

258397 is a wasteful number, since it uses less digits than its factorization.

258397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342.

The product of its digits is 15120, while the sum is 34.

The square root of 258397 is about 508.3276502415. The cubic root of 258397 is about 63.6936038470.

The spelling of 258397 in words is "two hundred fifty-eight thousand, three hundred ninety-seven".