42109755 has 16 divisors (see below), whose sum is σ = 67808544. Its totient is φ = 22314240.

The previous prime is 42109751. The next prime is 42109763. The reversal of 42109755 is 55790124.

It is not a de Polignac number, because 42109755 - 2² = 42109751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42109751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6586 + ... + 11295.

It is an arithmetic number, because the mean of its divisors is an integer number (4238034).

Almost surely, 2^42109755 is an apocalyptic number.

42109755 is a deficient number, since it is larger than the sum of its proper divisors (25698789).

42109755 is a wasteful number, since it uses less digits than its factorization.

42109755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18046.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 42109755 is about 6489.2029556795. The cubic root of 42109755 is about 347.9051878715.

Adding to 42109755 its reverse (55790124), we get a palindrome (97899879).

The spelling of 42109755 in words is "forty-two million, one hundred nine thousand, seven hundred fifty-five".