42504401 has 4 divisors (see below), whose sum is σ = 43970100. Its totient is φ = 41038704.

The previous prime is 42504337. The next prime is 42504433. The reversal of 42504401 is 10440524.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11155600 + 31348801 = 3340^2 + 5599^2 .

It is a cyclic number.

It is not a de Polignac number, because 42504401 - 2⁶ = 42504337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42504481) 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, 732806 + ... + 732863.

It is an arithmetic number, because the mean of its divisors is an integer number (10992525).

Almost surely, 2^42504401 is an apocalyptic number.

It is an amenable number.

42504401 is a deficient number, since it is larger than the sum of its proper divisors (1465699).

42504401 is a wasteful number, since it uses less digits than its factorization.

42504401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465698.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 42504401 is about 6519.5399377563. The cubic root of 42504401 is about 348.9886477809.

Adding to 42504401 its reverse (10440524), we get a palindrome (52944925).

The spelling of 42504401 in words is "forty-two million, five hundred four thousand, four hundred one".