258827421 has 4 divisors (see below), whose sum is σ = 345103232. Its totient is φ = 172551612.

The previous prime is 258827417. The next prime is 258827423. The reversal of 258827421 is 124728852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 258827421 - 2² = 258827417 is a prime.

It is a super-2 number, since 2×258827421² = 133983267723022482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 258827421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258827423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43137901 + ... + 43137906.

It is an arithmetic number, because the mean of its divisors is an integer number (86275808).

Almost surely, 2^258827421 is an apocalyptic number.

It is an amenable number.

258827421 is a deficient number, since it is larger than the sum of its proper divisors (86275811).

258827421 is an equidigital number, since it uses as much as digits as its factorization.

258827421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86275810.

The product of its digits is 71680, while the sum is 39.

The square root of 258827421 is about 16088.1142773167. The cubic root of 258827421 is about 637.2894978971.

The spelling of 258827421 in words is "two hundred fifty-eight million, eight hundred twenty-seven thousand, four hundred twenty-one".