258047621 has 6 divisors (see below), whose sum is σ = 279424530. Its totient is φ = 238197648.

The previous prime is 258047611. The next prime is 258047681. The reversal of 258047621 is 126740852.

It can be written as a sum of positive squares in 3 ways, for example, as 14250625 + 243796996 = 3775^2 + 15614^2 .

It is not a de Polignac number, because 258047621 - 2¹⁴ = 258031237 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 (258047611) 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, 763286 + ... + 763623.

It is an arithmetic number, because the mean of its divisors is an integer number (46570755).

Almost surely, 2^258047621 is an apocalyptic number.

It is an amenable number.

258047621 is a deficient number, since it is larger than the sum of its proper divisors (21376909).

258047621 is a wasteful number, since it uses less digits than its factorization.

258047621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526935 (or 1526922 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 258047621 is about 16063.8607127926. The cubic root of 258047621 is about 636.6488415770.

The spelling of 258047621 in words is "two hundred fifty-eight million, forty-seven thousand, six hundred twenty-one".