257244142 has 8 divisors (see below), whose sum is σ = 389406600. Its totient is φ = 127441944.

The previous prime is 257244131. The next prime is 257244149. The reversal of 257244142 is 241442752.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257244149) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 589792 + ... + 590227.

It is an arithmetic number, because the mean of its divisors is an integer number (48675825).

Almost surely, 2^257244142 is an apocalyptic number.

257244142 is a deficient number, since it is larger than the sum of its proper divisors (132162458).

257244142 is a wasteful number, since it uses less digits than its factorization.

257244142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180130.

The product of its digits is 17920, while the sum is 31.

The square root of 257244142 is about 16038.8323141057. The cubic root of 257244142 is about 635.9873799297.

Adding to 257244142 its reverse (241442752), we get a palindrome (498686894).

The spelling of 257244142 in words is "two hundred fifty-seven million, two hundred forty-four thousand, one hundred forty-two".