42109529 has 32 divisors (see below), whose sum is σ = 55987200. Its totient is φ = 30680640.

The previous prime is 42109519. The next prime is 42109531. The reversal of 42109529 is 92590124.

It is a cyclic number.

It is not a de Polignac number, because 42109529 - 2¹⁶ = 42043993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42109495 and 42109504.

It is not an unprimeable number, because it can be changed into a prime (42109519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156407 + ... + 156675.

It is an arithmetic number, because the mean of its divisors is an integer number (1749600).

Almost surely, 2^42109529 is an apocalyptic number.

It is an amenable number.

42109529 is a deficient number, since it is larger than the sum of its proper divisors (13877671).

42109529 is a wasteful number, since it uses less digits than its factorization.

42109529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 42109529 is about 6489.1855421154. The cubic root of 42109529 is about 347.9045654764.

It can be divided in two parts, 421095 and 29, that added together give a palindrome (421124).

The spelling of 42109529 in words is "forty-two million, one hundred nine thousand, five hundred twenty-nine".