42580261 has 4 divisors (see below), whose sum is σ = 43486272. Its totient is φ = 41674252.

The previous prime is 42580259. The next prime is 42580283. The reversal of 42580261 is 16208524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42580261 - 2¹ = 42580259 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 (42580201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452935 + ... + 453028.

It is an arithmetic number, because the mean of its divisors is an integer number (10871568).

Almost surely, 2^42580261 is an apocalyptic number.

It is an amenable number.

42580261 is a deficient number, since it is larger than the sum of its proper divisors (906011).

42580261 is an equidigital number, since it uses as much as digits as its factorization.

42580261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906010.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 42580261 is about 6525.3552393720. The cubic root of 42580261 is about 349.1961442891.

Adding to 42580261 its reverse (16208524), we get a palindrome (58788785).

The spelling of 42580261 in words is "forty-two million, five hundred eighty thousand, two hundred sixty-one".