42545261 has 8 divisors (see below), whose sum is σ = 46583904. Its totient is φ = 38535120.

The previous prime is 42545221. The next prime is 42545287. The reversal of 42545261 is 16254524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42545261 - 2¹⁰ = 42544237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42545221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3935 + ... + 10028.

It is an arithmetic number, because the mean of its divisors is an integer number (5822988).

Almost surely, 2^42545261 is an apocalyptic number.

It is an amenable number.

42545261 is a deficient number, since it is larger than the sum of its proper divisors (4038643).

42545261 is a wasteful number, since it uses less digits than its factorization.

42545261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14251.

The product of its digits is 9600, while the sum is 29.

The square root of 42545261 is about 6522.6728417114. The cubic root of 42545261 is about 349.1004409828.

Adding to 42545261 its reverse (16254524), we get a palindrome (58799785).

The spelling of 42545261 in words is "forty-two million, five hundred forty-five thousand, two hundred sixty-one".