257602045 has 8 divisors (see below), whose sum is σ = 312596280. Its totient is φ = 203765760.

The previous prime is 257602039. The next prime is 257602109. The reversal of 257602045 is 540206752.

It can be written as a sum of positive squares in 4 ways, for example, as 1249924 + 256352121 = 1118^2 + 16011^2 .

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

It is not a de Polignac number, because 257602045 - 2⁵ = 257602013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257601998 and 257602016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288996 + ... + 289885.

It is an arithmetic number, because the mean of its divisors is an integer number (39074535).

Almost surely, 2^257602045 is an apocalyptic number.

It is an amenable number.

257602045 is a deficient number, since it is larger than the sum of its proper divisors (54994235).

257602045 is an equidigital number, since it uses as much as digits as its factorization.

257602045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578975.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 257602045 is about 16049.9858255389. The cubic root of 257602045 is about 636.2821923568.

Adding to 257602045 its reverse (540206752), we get a palindrome (797808797).

The spelling of 257602045 in words is "two hundred fifty-seven million, six hundred two thousand, forty-five".