42509349 has 12 divisors (see below), whose sum is σ = 61772256. Its totient is φ = 28168872.

The previous prime is 42509317. The next prime is 42509353. The reversal of 42509349 is 94390524.

It is not a de Polignac number, because 42509349 - 2⁵ = 42509317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42509149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12639 + ... + 15644.

It is an arithmetic number, because the mean of its divisors is an integer number (5147688).

Almost surely, 2^42509349 is an apocalyptic number.

It is an amenable number.

42509349 is a deficient number, since it is larger than the sum of its proper divisors (19262907).

42509349 is a wasteful number, since it uses less digits than its factorization.

42509349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28456 (or 28453 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 42509349 is about 6519.9194013423. The cubic root of 42509349 is about 349.0021893498.

The spelling of 42509349 in words is "forty-two million, five hundred nine thousand, three hundred forty-nine".