257282643 has 8 divisors (see below), whose sum is σ = 344348928. Its totient is φ = 170869064.

The previous prime is 257282633. The next prime is 257282647. The reversal of 257282643 is 346282752.

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

It is a cyclic number.

It is not a de Polignac number, because 257282643 - 2⁵ = 257282611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257282647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162255 + ... + 163832.

It is an arithmetic number, because the mean of its divisors is an integer number (43043616).

Almost surely, 2^257282643 is an apocalyptic number.

257282643 is a deficient number, since it is larger than the sum of its proper divisors (87066285).

257282643 is a wasteful number, since it uses less digits than its factorization.

257282643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326353.

The product of its digits is 161280, while the sum is 39.

The square root of 257282643 is about 16040.0325124359. The cubic root of 257282643 is about 636.0191071551.

The spelling of 257282643 in words is "two hundred fifty-seven million, two hundred eighty-two thousand, six hundred forty-three".