42857549 has 16 divisors (see below), whose sum is σ = 50198400. Its totient is φ = 35830080.

The previous prime is 42857543. The next prime is 42857569. The reversal of 42857549 is 94575824.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42857549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42857543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122627 + ... + 122975.

It is an arithmetic number, because the mean of its divisors is an integer number (3137400).

Almost surely, 2^42857549 is an apocalyptic number.

It is an amenable number.

42857549 is a deficient number, since it is larger than the sum of its proper divisors (7340851).

42857549 is a wasteful number, since it uses less digits than its factorization.

42857549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740.

The product of its digits is 403200, while the sum is 44.

The square root of 42857549 is about 6546.5677266794. The cubic root of 42857549 is about 349.9525078417.

The spelling of 42857549 in words is "forty-two million, eight hundred fifty-seven thousand, five hundred forty-nine".