257235605 has 8 divisors (see below), whose sum is σ = 336744864. Its totient is φ = 187080400.

The previous prime is 257235569. The next prime is 257235617. The reversal of 257235605 is 506532752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 257235605 - 2²² = 253041301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2338451 + ... + 2338560.

It is an arithmetic number, because the mean of its divisors is an integer number (42093108).

Almost surely, 2^257235605 is an apocalyptic number.

It is an amenable number.

257235605 is a deficient number, since it is larger than the sum of its proper divisors (79509259).

257235605 is a wasteful number, since it uses less digits than its factorization.

257235605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4677027.

The product of its (nonzero) digits is 63000, while the sum is 35.

The square root of 257235605 is about 16038.5661765633. The cubic root of 257235605 is about 635.9803444804.

The spelling of 257235605 in words is "two hundred fifty-seven million, two hundred thirty-five thousand, six hundred five".