42504641 has 4 divisors (see below), whose sum is σ = 45004932. Its totient is φ = 40004352.

The previous prime is 42504593. The next prime is 42504677. The reversal of 42504641 is 14640524.

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 21893041 + 20611600 = 4679^2 + 4540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42504641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42504641.

It is not an unprimeable number, because it can be changed into a prime (42509641) 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, 1250120 + ... + 1250153.

It is an arithmetic number, because the mean of its divisors is an integer number (11251233).

Almost surely, 2^42504641 is an apocalyptic number.

It is an amenable number.

42504641 is a deficient number, since it is larger than the sum of its proper divisors (2500291).

42504641 is a wasteful number, since it uses less digits than its factorization.

42504641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500290.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 42504641 is about 6519.5583439371. The cubic root of 42504641 is about 348.9893046314.

The spelling of 42504641 in words is "forty-two million, five hundred four thousand, six hundred forty-one".