42005501 has 4 divisors (see below), whose sum is σ = 42018912. Its totient is φ = 41992092.

The previous prime is 42005497. The next prime is 42005503. The reversal of 42005501 is 10550024.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42005501 - 2² = 42005497 is a prime.

It is a super-2 number, since 2×42005501² = 3528924228522002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42005501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42005503) 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, 776 + ... + 9198.

It is an arithmetic number, because the mean of its divisors is an integer number (10504728).

Almost surely, 2^42005501 is an apocalyptic number.

It is an amenable number.

42005501 is a deficient number, since it is larger than the sum of its proper divisors (13411).

42005501 is an equidigital number, since it uses as much as digits as its factorization.

42005501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13410.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 42005501 is about 6481.1650958759. The cubic root of 42005501 is about 347.6178397171.

Adding to 42005501 its reverse (10550024), we get a palindrome (52555525).

The spelling of 42005501 in words is "forty-two million, five thousand, five hundred one".