42003722 has 4 divisors (see below), whose sum is σ = 63005586. Its totient is φ = 21001860.

The previous prime is 42003697. The next prime is 42003739. The reversal of 42003722 is 22730024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42003361 + 361 = 6481^2 + 19^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42003694 and 42003703.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500929 + ... + 10500932.

Almost surely, 2^42003722 is an apocalyptic number.

42003722 is a deficient number, since it is larger than the sum of its proper divisors (21001864).

42003722 is a wasteful number, since it uses less digits than its factorization.

42003722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21001863.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 42003722 is about 6481.0278505805. The cubic root of 42003722 is about 347.6129322577.

Adding to 42003722 its reverse (22730024), we get a palindrome (64733746).

The spelling of 42003722 in words is "forty-two million, three thousand, seven hundred twenty-two".