42003261 has 12 divisors (see below), whose sum is σ = 60765120. Its totient is φ = 27958920.

The previous prime is 42003257. The next prime is 42003271. The reversal of 42003261 is 16230024.

It is a happy number.

42003261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42003261 - 2² = 42003257 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42003211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3226 + ... + 9716.

It is an arithmetic number, because the mean of its divisors is an integer number (5063760).

Almost surely, 2^42003261 is an apocalyptic number.

It is an amenable number.

42003261 is a deficient number, since it is larger than the sum of its proper divisors (18761859).

42003261 is a wasteful number, since it uses less digits than its factorization.

42003261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7216 (or 7213 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 42003261 is about 6480.9922851366. The cubic root of 42003261 is about 347.6116605438.

Adding to 42003261 its reverse (16230024), we get a palindrome (58233285).

The spelling of 42003261 in words is "forty-two million, three thousand, two hundred sixty-one".