257530046 has 8 divisors (see below), whose sum is σ = 391185120. Its totient is φ = 127135008.

The previous prime is 257530043. The next prime is 257530067. The reversal of 257530046 is 640035752.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 257529994 and 257530021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257530043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 814811 + ... + 815126.

It is an arithmetic number, because the mean of its divisors is an integer number (48898140).

Almost surely, 2^257530046 is an apocalyptic number.

257530046 is a deficient number, since it is larger than the sum of its proper divisors (133655074).

257530046 is a wasteful number, since it uses less digits than its factorization.

257530046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630018.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 257530046 is about 16047.7427073093. The cubic root of 257530046 is about 636.2229071775. Note that the first 3 decimals are identical.

Adding to 257530046 its reverse (640035752), we get a palindrome (897565798).

The spelling of 257530046 in words is "two hundred fifty-seven million, five hundred thirty thousand, forty-six".