257143417 has 8 divisors (see below), whose sum is σ = 261802080. Its totient is φ = 252494880.

The previous prime is 257143409. The next prime is 257143423. The reversal of 257143417 is 714341752.

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 257143417 - 2³ = 257143409 is a prime.

It is a super-2 number, since 2×257143417² = 132245473812871778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257143457) 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 7 ways as a sum of consecutive naturals, for example, 64317 + ... + 68197.

It is an arithmetic number, because the mean of its divisors is an integer number (32725260).

Almost surely, 2^257143417 is an apocalyptic number.

It is an amenable number.

257143417 is a deficient number, since it is larger than the sum of its proper divisors (4658663).

257143417 is a wasteful number, since it uses less digits than its factorization.

257143417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5063.

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

The square root of 257143417 is about 16035.6919713494. The cubic root of 257143417 is about 635.9043612700.

The spelling of 257143417 in words is "two hundred fifty-seven million, one hundred forty-three thousand, four hundred seventeen".