42349509 has 12 divisors (see below), whose sum is σ = 63831456. Its totient is φ = 27005352.

The previous prime is 42349507. The next prime is 42349511. The reversal of 42349509 is 90594324.

It is an interprime number because it is at equal distance from previous prime (42349507) and next prime (42349511).

It is not a de Polignac number, because 42349509 - 2¹ = 42349507 is a prime.

It is a Curzon number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42349501) 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, 102087 + ... + 102500.

It is an arithmetic number, because the mean of its divisors is an integer number (5319288).

Almost surely, 2^42349509 is an apocalyptic number.

It is an amenable number.

42349509 is a deficient number, since it is larger than the sum of its proper divisors (21481947).

42349509 is a wasteful number, since it uses less digits than its factorization.

42349509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204616 (or 204613 counting only the distinct ones).

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

The square root of 42349509 is about 6507.6500366876. The cubic root of 42349509 is about 348.5642105962.

The spelling of 42349509 in words is "forty-two million, three hundred forty-nine thousand, five hundred nine".