42404002 has 4 divisors (see below), whose sum is σ = 63606006. Its totient is φ = 21202000.

The previous prime is 42403981. The next prime is 42404017. The reversal of 42404002 is 20040424.

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., 25090081 + 17313921 = 5009^2 + 4161^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600999 + ... + 10601002.

Almost surely, 2^42404002 is an apocalyptic number.

42404002 is a deficient number, since it is larger than the sum of its proper divisors (21202004).

42404002 is a wasteful number, since it uses less digits than its factorization.

42404002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21202003.

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 42404002 is about 6511.8355323211. The cubic root of 42404002 is about 348.7136508837.

Adding to 42404002 its reverse (20040424), we get a palindrome (62444426).

The spelling of 42404002 in words is "forty-two million, four hundred four thousand, two".