257476742 has 8 divisors (see below), whose sum is σ = 386289000. Its totient is φ = 128713744.

The previous prime is 257476741. The next prime is 257476753. The reversal of 257476742 is 247674752.

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 = 257476693 and 257476702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257476741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6509 + ... + 23607.

It is an arithmetic number, because the mean of its divisors is an integer number (48286125).

Almost surely, 2^257476742 is an apocalyptic number.

257476742 is a deficient number, since it is larger than the sum of its proper divisors (128812258).

257476742 is a wasteful number, since it uses less digits than its factorization.

257476742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24630.

The product of its digits is 658560, while the sum is 44.

The square root of 257476742 is about 16046.0818270380. The cubic root of 257476742 is about 636.1790086545.

The spelling of 257476742 in words is "two hundred fifty-seven million, four hundred seventy-six thousand, seven hundred forty-two".