42565501 has 12 divisors (see below), whose sum is σ = 49541436. Its totient is φ = 36417920.

The previous prime is 42565499. The next prime is 42565507. The reversal of 42565501 is 10556524.

It can be written as a sum of positive squares in 2 ways, for example, as 35940025 + 6625476 = 5995^2 + 2574^2 .

It is not a de Polignac number, because 42565501 - 2¹ = 42565499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42565501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42565507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8290 + ... + 12403.

It is an arithmetic number, because the mean of its divisors is an integer number (4128453).

Almost surely, 2^42565501 is an apocalyptic number.

It is an amenable number.

42565501 is a deficient number, since it is larger than the sum of its proper divisors (6975935).

42565501 is a wasteful number, since it uses less digits than its factorization.

42565501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20732 (or 20721 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 42565501 is about 6524.2241684357. The cubic root of 42565501 is about 349.1557912348.

The spelling of 42565501 in words is "forty-two million, five hundred sixty-five thousand, five hundred one".