42169520 has 80 divisors (see below), whose sum is σ = 105180768. Its totient is φ = 15667200.

The previous prime is 42169513. The next prime is 42169549. The reversal of 42169520 is 2596124.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137207 + ... + 137513.

Almost surely, 2^42169520 is an apocalyptic number.

42169520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42169520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52590384).

42169520 is an abundant number, since it is smaller than the sum of its proper divisors (63011248).

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

42169520 is a wasteful number, since it uses less digits than its factorization.

42169520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 42169520 is about 6493.8062798331. The cubic root of 42169520 is about 348.0697002240.

It can be divided in two parts, 4216 and 9520, that multiplied together give a triangular number (40136320 = T₈₉₅₉).

The spelling of 42169520 in words is "forty-two million, one hundred sixty-nine thousand, five hundred twenty".