42056501 has 4 divisors (see below), whose sum is σ = 42473004. Its totient is φ = 41640000.

The previous prime is 42056477. The next prime is 42056513. The reversal of 42056501 is 10565024.

42056501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 33062500 + 8994001 = 5750^2 + 2999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42056501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42056551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208100 + ... + 208301.

It is an arithmetic number, because the mean of its divisors is an integer number (10618251).

Almost surely, 2^42056501 is an apocalyptic number.

It is an amenable number.

42056501 is a deficient number, since it is larger than the sum of its proper divisors (416503).

42056501 is a wasteful number, since it uses less digits than its factorization.

42056501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416502.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 42056501 is about 6485.0983801327. The cubic root of 42056501 is about 347.7584668520.

The spelling of 42056501 in words is "forty-two million, fifty-six thousand, five hundred one".