42685539 has 24 divisors (see below), whose sum is σ = 64103760. Its totient is φ = 25113792.

The previous prime is 42685537. The next prime is 42685547. The reversal of 42685539 is 93558624.

It is not a de Polignac number, because 42685539 - 2¹ = 42685537 is a prime.

It is a super-3 number, since 3×42685539³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42685539.

It is not an unprimeable number, because it can be changed into a prime (42685537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19597 + ... + 21665.

It is an arithmetic number, because the mean of its divisors is an integer number (2670990).

Almost surely, 2^42685539 is an apocalyptic number.

42685539 is a deficient number, since it is larger than the sum of its proper divisors (21418221).

42685539 is a wasteful number, since it uses less digits than its factorization.

42685539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131 (or 2108 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The square root of 42685539 is about 6533.4170998031. The cubic root of 42685539 is about 349.4836986181.

The spelling of 42685539 in words is "forty-two million, six hundred eighty-five thousand, five hundred thirty-nine".