42297539 has 4 divisors (see below), whose sum is σ = 42435624. Its totient is φ = 42159456.

The previous prime is 42297533. The next prime is 42297557. The reversal of 42297539 is 93579224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42297539 - 2¹² = 42293443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42297496 and 42297505.

It is not an unprimeable number, because it can be changed into a prime (42297533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68582 + ... + 69195.

It is an arithmetic number, because the mean of its divisors is an integer number (10608906).

Almost surely, 2^42297539 is an apocalyptic number.

42297539 is a deficient number, since it is larger than the sum of its proper divisors (138085).

42297539 is a wasteful number, since it uses less digits than its factorization.

42297539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138084.

The product of its digits is 136080, while the sum is 41.

The square root of 42297539 is about 6503.6558180765. The cubic root of 42297539 is about 348.4215698469.

The spelling of 42297539 in words is "forty-two million, two hundred ninety-seven thousand, five hundred thirty-nine".