42597309 has 8 divisors (see below), whose sum is σ = 57317920. Its totient is φ = 28137456.

The previous prime is 42597299. The next prime is 42597329. The reversal of 42597309 is 90379524.

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

It is not a de Polignac number, because 42597309 - 2⁵ = 42597277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42597329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64807 + ... + 65460.

It is an arithmetic number, because the mean of its divisors is an integer number (7164740).

Almost surely, 2^42597309 is an apocalyptic number.

It is an amenable number.

42597309 is a deficient number, since it is larger than the sum of its proper divisors (14720611).

42597309 is a wasteful number, since it uses less digits than its factorization.

42597309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130379.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 42597309 is about 6526.6613976826. The cubic root of 42597309 is about 349.2427410095.

The spelling of 42597309 in words is "forty-two million, five hundred ninety-seven thousand, three hundred nine".