42169205 has 16 divisors (see below), whose sum is σ = 54752880. Its totient is φ = 30993408.

The previous prime is 42169201. The next prime is 42169223. The reversal of 42169205 is 50296124.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 152881 + 42016324 = 391^2 + 6482^2 .

It is a cyclic number.

It is not a de Polignac number, because 42169205 - 2² = 42169201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42169201) 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, 13469 + ... + 16301.

It is an arithmetic number, because the mean of its divisors is an integer number (3422055).

Almost surely, 2^42169205 is an apocalyptic number.

It is an amenable number.

42169205 is a deficient number, since it is larger than the sum of its proper divisors (12583675).

42169205 is a wasteful number, since it uses less digits than its factorization.

42169205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3080.

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

The square root of 42169205 is about 6493.7820259076. The cubic root of 42169205 is about 348.0688335457.

The spelling of 42169205 in words is "forty-two million, one hundred sixty-nine thousand, two hundred five".