257000605 has 4 divisors (see below), whose sum is σ = 308400732. Its totient is φ = 205600480.

The previous prime is 257000599. The next prime is 257000609. The reversal of 257000605 is 506000752.

It is a happy number.

257000605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 132388036 + 124612569 = 11506^2 + 11163^2 .

It is not a de Polignac number, because 257000605 - 2⁵ = 257000573 is a prime.

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 257000605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257000609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25700056 + ... + 25700065.

It is an arithmetic number, because the mean of its divisors is an integer number (77100183).

Almost surely, 2^257000605 is an apocalyptic number.

It is an amenable number.

257000605 is a deficient number, since it is larger than the sum of its proper divisors (51400127).

257000605 is an equidigital number, since it uses as much as digits as its factorization.

257000605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51400126.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 257000605 is about 16031.2384113019. The cubic root of 257000605 is about 635.7866168713.

The spelling of 257000605 in words is "two hundred fifty-seven million, six hundred five", and thus it is an aban number.