258825421 has 2 divisors, whose sum is σ = 258825422. Its totient is φ = 258825420.

The previous prime is 258825419. The next prime is 258825433. The reversal of 258825421 is 124528852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254881225 + 3944196 = 15965^2 + 1986^2 .

It is a cyclic number.

It is not a de Polignac number, because 258825421 - 2¹ = 258825419 is a prime.

Together with 258825419, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258825461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129412710 + 129412711.

It is an arithmetic number, because the mean of its divisors is an integer number (129412711).

Almost surely, 2^258825421 is an apocalyptic number.

It is an amenable number.

258825421 is a deficient number, since it is larger than the sum of its proper divisors (1).

258825421 is an equidigital number, since it uses as much as digits as its factorization.

258825421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51200, while the sum is 37.

The square root of 258825421 is about 16088.0521195078. The cubic root of 258825421 is about 637.2878564143.

The spelling of 258825421 in words is "two hundred fifty-eight million, eight hundred twenty-five thousand, four hundred twenty-one".