42109430 has 16 divisors (see below), whose sum is σ = 82687824. Its totient is φ = 15312480.

The previous prime is 42109423. The next prime is 42109447. The reversal of 42109430 is 3490124.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42109396 and 42109405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191297 + ... + 191516.

It is an arithmetic number, because the mean of its divisors is an integer number (5167989).

Almost surely, 2^42109430 is an apocalyptic number.

42109430 is a deficient number, since it is larger than the sum of its proper divisors (40578394).

42109430 is a wasteful number, since it uses less digits than its factorization.

42109430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382831.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 42109430 is about 6489.1779140350. The cubic root of 42109430 is about 347.9042928337.

Adding to 42109430 its reverse (3490124), we get a palindrome (45599554).

It can be divided in two parts, 421094 and 30, that added together give a palindrome (421124).

The spelling of 42109430 in words is "forty-two million, one hundred nine thousand, four hundred thirty".