42497 has 8 divisors (see below), whose sum is σ = 52416. Its totient is φ = 33552.

The previous prime is 42491. The next prime is 42499. The reversal of 42497 is 79424.

42497 is nontrivially palindromic in base 6.

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 42497 - 2⁶ = 42433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143 + ... + 324.

It is an arithmetic number, because the mean of its divisors is an integer number (6552).

It is a Proth number, since it is equal to 83 ⋅ 2⁹ + 1 and 83 < 2⁹.

2⁴²⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

42497 is a deficient number, since it is larger than the sum of its proper divisors (9919).

42497 is a wasteful number, since it uses less digits than its factorization.

42497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487.

The product of its digits is 2016, while the sum is 26.

The square root of 42497 is about 206.1480050837. The cubic root of 42497 is about 34.8968390938.

The spelling of 42497 in words is "forty-two thousand, four hundred ninety-seven".