257760142 has 8 divisors (see below), whose sum is σ = 387051336. Its totient is φ = 128743032.

The previous prime is 257760131. The next prime is 257760143. The reversal of 257760142 is 241067752.

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

It is a junction number, because it is equal to n+sod(n) for n = 257760098 and 257760107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257760143) 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, 66153 + ... + 69940.

It is an arithmetic number, because the mean of its divisors is an integer number (48381417).

Almost surely, 2^257760142 is an apocalyptic number.

257760142 is a deficient number, since it is larger than the sum of its proper divisors (129291194).

257760142 is a wasteful number, since it uses less digits than its factorization.

257760142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137042.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 257760142 is about 16054.9102146353. The cubic root of 257760142 is about 636.4123333186.

The spelling of 257760142 in words is "two hundred fifty-seven million, seven hundred sixty thousand, one hundred forty-two".