258425 has 6 divisors (see below), whose sum is σ = 320478. Its totient is φ = 206720.

The previous prime is 258421. The next prime is 258437. The reversal of 258425 is 524852.

It can be written as a sum of positive squares in 3 ways, for example, as 361 + 258064 = 19^2 + 508^2 .

It is not a de Polignac number, because 258425 - 2² = 258421 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 258394 and 258403.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 258425.

It is not an unprimeable number, because it can be changed into a prime (258421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5144 + ... + 5193.

It is an arithmetic number, because the mean of its divisors is an integer number (53413).

2²⁵⁸⁴²⁵ is an apocalyptic number.

258425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

258425 is a deficient number, since it is larger than the sum of its proper divisors (62053).

258425 is a wasteful number, since it uses less digits than its factorization.

258425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10347 (or 10342 counting only the distinct ones).

The product of its digits is 3200, while the sum is 26.

The square root of 258425 is about 508.3551907869. The cubic root of 258425 is about 63.6959043852.

The spelling of 258425 in words is "two hundred fifty-eight thousand, four hundred twenty-five".