42509669 has 8 divisors (see below), whose sum is σ = 44809440. Its totient is φ = 40216176.

The previous prime is 42509653. The next prime is 42509717. The reversal of 42509669 is 96690524.

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 42509669 - 2⁴ = 42509653 is a prime.

It is a super-2 number, since 2×42509669² = 3614143916979122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42500669) 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 7 ways as a sum of consecutive naturals, for example, 20222 + ... + 22224.

It is an arithmetic number, because the mean of its divisors is an integer number (5601180).

Almost surely, 2^42509669 is an apocalyptic number.

It is an amenable number.

42509669 is a deficient number, since it is larger than the sum of its proper divisors (2299771).

42509669 is a wasteful number, since it uses less digits than its factorization.

42509669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3139.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 42509669 is about 6519.9439414768. The cubic root of 42509669 is about 349.0030650820.

The spelling of 42509669 in words is "forty-two million, five hundred nine thousand, six hundred sixty-nine".