42003361 has 3 divisors (see below), whose sum is σ = 42009843. Its totient is φ = 41996880.

The previous prime is 42003337. The next prime is 42003371. The reversal of 42003361 is 16330024.

The square root of 42003361 is 6481.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 39929761 + 2073600 = 6319^2 + 1440^2 .

It is not a de Polignac number, because 42003361 - 2⁵ = 42003329 is a prime.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42003371) 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 2 ways as a sum of consecutive naturals, for example, 3241 + ... + 9721.

It is an arithmetic number, because the mean of its divisors is an integer number (14003281).

Almost surely, 2^42003361 is an apocalyptic number.

42003361 is the 6481-st square number.

42003361 is the 3241-st centered octagonal number.

It is an amenable number.

42003361 is a deficient number, since it is larger than the sum of its proper divisors (6482).

42003361 is an frugal number, since it uses more digits than its factorization.

42003361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12962 (or 6481 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The cubic root of 42003361 is about 347.6119364045.

Adding to 42003361 its reverse (16330024), we get a palindrome (58333385).

The spelling of 42003361 in words is "forty-two million, three thousand, three hundred sixty-one".