257836542 has 8 divisors (see below), whose sum is σ = 515673096. Its totient is φ = 85945512.

The previous prime is 257836541. The next prime is 257836559. The reversal of 257836542 is 245638752.

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

257836542 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 257836494 and 257836503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257836541) 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, 21486373 + ... + 21486384.

It is an arithmetic number, because the mean of its divisors is an integer number (64459137).

Almost surely, 2^257836542 is an apocalyptic number.

257836542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257836542 is a wasteful number, since it uses less digits than its factorization.

257836542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42972762.

The product of its digits is 403200, while the sum is 42.

The square root of 257836542 is about 16057.2893727428. The cubic root of 257836542 is about 636.4752045585.

The spelling of 257836542 in words is "two hundred fifty-seven million, eight hundred thirty-six thousand, five hundred forty-two".