42108720 has 40 divisors (see below), whose sum is σ = 130537776. Its totient is φ = 11228928.

The previous prime is 42108697. The next prime is 42108721. The reversal of 42108720 is 2780124.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (42108721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87487 + ... + 87966.

Almost surely, 2^42108720 is an apocalyptic number.

42108720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42108720 is an abundant number, since it is smaller than the sum of its proper divisors (88429056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42108720 is a wasteful number, since it uses less digits than its factorization.

42108720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175469 (or 175463 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 42108720 is about 6489.1232073370. The cubic root of 42108720 is about 347.9023375041.

Adding to 42108720 its reverse (2780124), we get a palindrome (44888844).

The spelling of 42108720 in words is "forty-two million, one hundred eight thousand, seven hundred twenty".