42210404 has 12 divisors (see below), whose sum is σ = 74144700. Its totient is φ = 21026208.

The previous prime is 42210403. The next prime is 42210407. The reversal of 42210404 is 40401224.

It can be written as a sum of positive squares in 2 ways, for example, as 25482304 + 16728100 = 5048^2 + 4090^2 .

It is not an unprimeable number, because it can be changed into a prime (42210403) 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, 18539 + ... + 20690.

It is an arithmetic number, because the mean of its divisors is an integer number (6178725).

Almost surely, 2^42210404 is an apocalyptic number.

It is an amenable number.

42210404 is a deficient number, since it is larger than the sum of its proper divisors (31934296).

42210404 is a wasteful number, since it uses less digits than its factorization.

42210404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39502 (or 39500 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42210404 is about 6496.9534398824. The cubic root of 42210404 is about 348.1821502053.

Adding to 42210404 its reverse (40401224), we get a palindrome (82611628).

The spelling of 42210404 in words is "forty-two million, two hundred ten thousand, four hundred four".